ALBERT — All Library Books, journals and Electronic Records Telegrafenberg

1

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Regional survey of pesticide residues in fish and fish products: Malaysia (2021)

Shapiin, Rohana ; Nor, Azlan Md.

Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore

In: http://aquaticcommons.org/id/eprint/26299 | 23782 | 2019-03-27 06:00:01 | 26299 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department

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Publikationsdatum: 2022-08-02

Schlagwort(e): Chemistry ; Fisheries ; Malaysia ; Pesticides ; Biological sampling ; Fish ; Fishery products ; Biochemical analysis ; Lethal limits

Repository-Name: AquaDocs

Materialart: book_section

Format: application/pdf

Format: 71-74

Format: 4

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Regional survey of pesticide residues in fish and fish products: Myanmar (2021)

Winn, U Than

Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore

In: http://aquaticcommons.org/id/eprint/26300 | 23782 | 2019-03-27 05:58:36 | 26300 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department

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Publikationsdatum: 2022-08-02

Schlagwort(e): Aquaculture ; Chemistry ; Fisheries ; Myanmar ; Pesticides ; Biological sampling ; Fish ; Fishery products ; Lethal limits

Repository-Name: AquaDocs

Materialart: book_section

Format: application/pdf

Format: 75-83

Format: 9

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3

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Regional survey of pesticide residues in fish and fish products: Thailand (2021)

Pucharoen, Jariya

Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore

In: http://aquaticcommons.org/id/eprint/26303 | 23782 | 2019-03-27 05:51:15 | 26303 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department

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Publikationsdatum: 2022-08-02

Schlagwort(e): Chemistry ; Fisheries ; Thailand ; Pesticides ; Biological sampling ; Fish ; Fishery products ; Dried products ; Lethal limits

Repository-Name: AquaDocs

Materialart: book_section

Format: application/pdf

Format: 100-105

Format: 6

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4

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Determination of chemical properties of meat: Determination of K value (2021)

Ng, Cher Siang

Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore

In: http://aquaticcommons.org/id/eprint/26826 | 23782 | 2019-11-21 00:56:12 | 26826 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department

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Publikationsdatum: 2022-08-02

Beschreibung: Presented in the paper is the standard procedure in the determination of K value which is an index to measure the enzymatic freshness of fish and squid. Specifically, reagents, apparatus and the analytical procedures needed and the calculations are presented.

Schlagwort(e): Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Chemical analysis ; Fishery products ; Fish inspection ; Fishery industry ; Food technology ; Standards ; Specifications

Repository-Name: AquaDocs

Materialart: book_section

Format: application/pdf

Format: B-6.1-B-6.7

Format: 7

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5

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Determination of chemical properties of meat: Freshness testing paper (2021)

Ng, Cher Siang

Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore

In: http://aquaticcommons.org/id/eprint/26825 | 23782 | 2019-11-21 00:52:35 | 26825 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department

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Publikationsdatum: 2022-08-02

Beschreibung: Presented in the paper is the standard procedure in measuring K value in fish meat by means of the freshness testing paper technique.

Schlagwort(e): Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Chemical analysis ; Fishery products ; Fish inspection ; Fishery industry ; Food technology ; Standards ; Specifications

Repository-Name: AquaDocs

Materialart: book_section

Format: application/pdf

Format: B-7.1-B-7.2

Format: 2

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6

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Determination of physical properties of meat: Measurement of pH (2021)

Lim, Pang Yong

Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore

In: http://aquaticcommons.org/id/eprint/26802 | 23782 | 2019-11-12 05:28:20 | 26802 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department

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Publikationsdatum: 2022-08-02

Beschreibung: Presented in the paper is the standard procedure in the measurement of pH in the fresh fish meat. Specifically, the procedures in sampling and sample preparation, apparatus and reagents required, and the analytical procedures are presented.

Schlagwort(e): Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Chemical analysis ; Microbiological analysis ; Fishery products ; Processed fishery products ; Fish inspection ; Fishery industry ; Food additives ; Food technology ; Standards ; Specifications ; pH

Repository-Name: AquaDocs

Materialart: book_section

Format: application/pdf

Format: A-3.1-A-3.2

Format: 2

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7

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Analysis of additives: Determination of starch (2021)

Ng, Mui Chng

Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore

In: http://aquaticcommons.org/id/eprint/26842 | 23782 | 2019-11-15 07:54:48 | 26842 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department

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Publikationsdatum: 2022-08-02

Beschreibung: Starch is commonly used in the production of fish jelly products as an extender and as binding agent. The paper provides the methodology in the determination of starch in fish jelly products. Instructions for sample preparation and the reagents needed are presented. Detailed procedures in the determination of the starch in a sample are provided.

Schlagwort(e): Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Chemical analysis ; Fishery products ; Fishery industry ; Food technology ; Standards ; Specifications ; Starch ; Additives ; Food additives

Repository-Name: AquaDocs

Materialart: book_section

Format: application/pdf

Format: D-4.1-D-4.4

Format: 4

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8

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Microbiological procedure: Vibrio cholera (2021)

Lim, Pang Yong

Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore

In: http://aquaticcommons.org/id/eprint/26852 | 23782 | 2019-11-15 07:36:44 | 26852 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department

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Publikationsdatum: 2022-08-02

Beschreibung: Cholera is an acute specific infection caused by the organism, Vibrio cholera. Diagnosis may be confirmed by the presence of large numbers of the comma-shaped bacilli on direct microscopic examination of a fecal or vomitus smear, and by the isolation of the organism on culture. Fish and shellfish have been identified as vehicles of cholera. Large numbers of V. cholera must usually be ingested to cause cholera. Thus problems often occur when poor handling and inadequate refrigeration have allowed the organism to multiply. Presented in the paper is the methodology of determining the presence of Vibrio cholera in fish and fishery products.

Schlagwort(e): Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Fishery products ; Fishery industry ; Food technology ; Standards ; Specifications ; Aerobic bacteria ; Microbiological analysis ; Microorganisms ; Pathogenic bacteria ; Pathogens ; Health and safety ; Public health ; Microbial contamination ; Vibrio cholerae

Repository-Name: AquaDocs

Materialart: book_section

Format: application/pdf

Format: E-7.1-E-7.5

Format: 5

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9

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Analysis of additives: Determination of salt (2021)

Ng, Mui Chng

Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore

In: http://aquaticcommons.org/id/eprint/26843 | 23782 | 2019-11-15 07:52:55 | 26843 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department

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Publikationsdatum: 2022-08-02

Beschreibung: Sodium chloride is an important additive for the production of fish jelly products. It extracts the salt soluble protein to give the gel strength of the final product. The paper provides the methodology in the determination of the amount of sodium chloride in fish jelly products. Instructions for sample preparation and the reagents needed are presented. Detailed procedures in the determination of the salt in a sample are provided.

Schlagwort(e): Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Chemical analysis ; Fishery products ; Fishery industry ; Food technology ; Standards ; Specifications ; Additives ; Food additives ; Salts ; Sodium chloride

Repository-Name: AquaDocs

Materialart: book_section

Format: application/pdf

Format: D-5.1-D-5.2

Format: 2

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10

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Microbiological procedure: Vibrio parahaemolyticus (2021)

Lim, Pang Yong

Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore

In: http://aquaticcommons.org/id/eprint/26851 | 23782 | 2019-11-14 01:29:31 | 26851 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department

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Publikationsdatum: 2022-08-02

Beschreibung: Food poisoning due to Vibrio parahaemolyticus is a food-borne infection resulting from the ingestion of a large number of this organism (about 106-109 viable cells). The major symptoms are diarrhea and abdominal pain with headache, fever, and vomiting also occurring. The organisms are excreted during the acute stage of the illness after which they decrease rapidly. The differentiation of V. parahaemolyticus from other pathogenic species of Vibrio is based mainly on salt tolerance, Voges-Proskauer reaction, fermentation of sucrose, and growth at 43°C. Presented in the paper is the methodology of determining the presence of Vibrio cholera in fish and fishery products.

Schlagwort(e): Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Fishery products ; Fishery industry ; Food technology ; Standards ; Specifications ; Aerobic bacteria ; Microbiological analysis ; Microorganisms ; Pathogenic bacteria ; Pathogens ; Health and safety ; Public health ; Microbial contamination ; Vibrio parahaemolyticus ; Vibrio cholerae

Repository-Name: AquaDocs

Materialart: book_section

Format: application/pdf

Format: E-8.1-E-8.6

Format: 6

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11

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Frustrated Kondo chains and glassy magnetic phases on the pyrochlore lattice (2018)

Jing Luo and Gia-Wei Chern

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-14

Beschreibung: Author(s): Jing Luo and Gia-Wei Chern We present an extensive numerical study of a type of frustrated itinerant magnetism on the pyrochlore lattice. In this theory, the pyrochlore magnet can be viewed as a cross-linking network of Kondo or double-exchange chains. Contrary to models based on Mott insulators, this itinerant magnetism appr... [Phys. Rev. B 98, 214423] Published Thu Dec 13, 2018

Schlagwort(e): Magnetism

Print ISSN: 1098-0121

Digitale ISSN: 1095-3795

Thema: Physik

Publiziert von American Physical Society (APS)

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12

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Assembly of eight spherical magnets into a dotriacontapole configuration (2018)

Stefan Hartung, Felix Sommer, Simeon Völkel, Johannes Schönke, and Ingo Rehberg

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-14

Beschreibung: Author(s): Stefan Hartung, Felix Sommer, Simeon Völkel, Johannes Schönke, and Ingo Rehberg The magnetic field of a cuboidal cluster of eight magnetic spheres is measured. It decays with the inverse seventh power of the distance. This corresponds formally to a multipole named a dotriacontapole. This strong decay is explained on the basis of dipole-dipole interaction and the symmetry of the... [Phys. Rev. B 98, 214424] Published Thu Dec 13, 2018

Schlagwort(e): Magnetism

Print ISSN: 1098-0121

Digitale ISSN: 1095-3795

Thema: Physik

Publiziert von American Physical Society (APS)

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13

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Left- or right-handed C-H bond activation (2018)

Yeston, J.

American Association for the Advancement of Science (AAAS)

In: Science

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Publikationsdatum: 2018-02-16

Schlagwort(e): Chemistry

Print ISSN: 0036-8075

Digitale ISSN: 1095-9203

Thema: Biologie , Chemie und Pharmazie , Geologie und Paläontologie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik

Publiziert von American Association for the Advancement of Science (AAAS)

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14

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Comment on "Selective anaerobic oxidation of methane enables direct synthesis of methanol" (2018)

Labinger, J. A.

American Association for the Advancement of Science (AAAS)

In: Science

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Publikationsdatum: 2018-02-16

Beschreibung: The comment and response concerning the report of oxidation of methane to methanol by water (Reports, 5 May 2017, p. 523) do not fully capture the implications of thermodynamic limitations. A nonisothermal process in which each cycle requires a large temperature swing and permits only substoichiometric methane conversion surely could not be carried out on any practical scale.

Schlagwort(e): Chemistry

Print ISSN: 0036-8075

Digitale ISSN: 1095-9203

Thema: Biologie , Chemie und Pharmazie , Geologie und Paläontologie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik

Publiziert von American Association for the Advancement of Science (AAAS)

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15

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Response to Comment on "Selective anaerobic oxidation of methane enables direct synthesis of methanol" (2018)

Sushkevich, V. L., Palagin, D., Ranocchiari, M., van Bokhoven, J. A.

American Association for the Advancement of Science (AAAS)

In: Science

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Publikationsdatum: 2018-02-16

Beschreibung: Labinger argues that stepwise reaction of methane with water to produce methanol and hydrogen will never be commercially feasible because of its substoichiometric basis with respect to the active site and the requirement of a large temperature swing. This comment is not touching any new ground, beyond describing the thermodynamic feasibility, thermal cycling, and the role of water as discussed previously. Most important, it does not have a solid numerical basis.

Schlagwort(e): Chemistry

Print ISSN: 0036-8075

Digitale ISSN: 1095-9203

Thema: Biologie , Chemie und Pharmazie , Geologie und Paläontologie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik

Publiziert von American Association for the Advancement of Science (AAAS)

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16

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Quantum collapse of a magnetic skyrmion (2018)

Amel Derras-Chouk, Eugene M. Chudnovsky, and Dmitry A. Garanin

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-26

Beschreibung: Author(s): Amel Derras-Chouk, Eugene M. Chudnovsky, and Dmitry A. Garanin Large thermal fluctuations can destroy skyrmions - tiny speckles of rotated magnetization in two-dimensional films. Yet at low temperatures skyrmions are believed to be topologically stable, which makes them good candidates for data storage and processing. However, as the authors demonstrate here, even at zero temperature a nanoscale skyrmion is not protected against quantum decay. The theory is based on the imaginary-time dynamics of the skyrmion. Due to the fact that even the smallest skyrmion is still formed by many atomic spins, its quantum decay provides an example of a nanoscale Schrödinger’s cat that one can study with modern measuring techniques. [Phys. Rev. B 98, 024423] Published Wed Jul 25, 2018

Schlagwort(e): Magnetism

Print ISSN: 1098-0121

Digitale ISSN: 1095-3795

Thema: Physik

Publiziert von American Physical Society (APS)

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17

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High figure of merit magneto-optics from interfacial skyrmions on topological insulators (2018)

Tonmoy K. Bhowmick, Amrit De, and Roger K. Lake

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-26

Beschreibung: Author(s): Tonmoy K. Bhowmick, Amrit De, and Roger K. Lake In the Kerr rotation geometry, magneto-optic memory devices typically suffer from low figure-of-merit (FOM) and long write times. We show that skyrmions formed at the interface of a thin-film multiferroic and a topological insulator can give rise to high FOM magneto-optic Kerr effects (MOKEs). Huge ... [Phys. Rev. B 98, 024424] Published Wed Jul 25, 2018

Schlagwort(e): Magnetism

Print ISSN: 1098-0121

Digitale ISSN: 1095-3795

Thema: Physik

Publiziert von American Physical Society (APS)

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18

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High magnetocaloric efficiency of a NiFe/NiCu/CoFe/MnIr multilayer in a small magnetic field (2018)

S. N. Vdovichev, N. I. Polushkin, I. D. Rodionov, V. N. Prudnikov, J. Chang, and A. A. Fraerman

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-27

Beschreibung: Author(s): S. N. Vdovichev, N. I. Polushkin, I. D. Rodionov, V. N. Prudnikov, J. Chang, and A. A. Fraerman The isothermal magnetic entropy changes Δ S (i.e., the magnetocaloric potential) are studied in Ni 80 Fe 20 / Ni 67 C u 33 / Co 90 Fe 10 / Mn 80 Ir 20 stacks at temperatures near the Curie point of the Ni 67 C u 33 spacer by applying magnetic fields of a few milli-Tesla. Such fields were sufficient for toggling magnetic mo... [Phys. Rev. B 98, 014428] Published Thu Jul 26, 2018

Schlagwort(e): Magnetism

Print ISSN: 1098-0121

Digitale ISSN: 1095-3795

Thema: Physik

Publiziert von American Physical Society (APS)

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19

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Magnetic field induced phenomena in UIrGe in fields applied along the $b$ axis (2018)

Jiří Pospíšil, Yoshinori Haga, Yoshimitsu Kohama, Atsushi Miyake, Shinsaku Kambe, Naoyuki Tateiwa, Michal Vališka, Petr Proschek, Jan Prokleška, Vladimír Sechovský, Masashi Tokunaga, Koichi Kindo, Akira Matsuo, and Etsuji Yamamoto

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-27

Beschreibung: Author(s): Jiří Pospíšil, Yoshinori Haga, Yoshimitsu Kohama, Atsushi Miyake, Shinsaku Kambe, Naoyuki Tateiwa, Michal Vališka, Petr Proschek, Jan Prokleška, Vladimír Sechovský, Masashi Tokunaga, Koichi Kindo, Akira Matsuo, and Etsuji Yamamoto The metamagnetic transition between the antiferromagnetic and paramagnetic state in UIrGe has been studied at various temperatures by magnetization, heat capacity, and magnetocaloric-effect measurements on a single crystal in static and pulsed magnetic fields applied along the orthorhombic b axis. A... [Phys. Rev. B 98, 014430] Published Thu Jul 26, 2018

Schlagwort(e): Magnetism

Print ISSN: 1098-0121

Digitale ISSN: 1095-3795

Thema: Physik

Publiziert von American Physical Society (APS)

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20

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Effect of uniaxial stress on the magnetic phases of ${\mathrm{CeAuSb}}_{2}$ (2018)

Joonbum Park, Hideaki Sakai, Andrew P. Mackenzie, and Clifford W. Hicks

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-27

Beschreibung: Author(s): Joonbum Park, Hideaki Sakai, Andrew P. Mackenzie, and Clifford W. Hicks We present results of measurements of resistivity of CeAuSb 2 under the combination of c -axis magnetic field and in-plane uniaxial stress. In unstressed CeAuSb 2 there are two magnetic phases. The low-field A phase is a single-component spin-density wave (SDW), with q = ( η , ± η , 1 / 2 ) , and the high-field B ... [Phys. Rev. B 98, 024426] Published Thu Jul 26, 2018

Schlagwort(e): Magnetism

Print ISSN: 1098-0121

Digitale ISSN: 1095-3795

Thema: Physik

Publiziert von American Physical Society (APS)

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21

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Silicon smooths the way to vinyl cations (2018)

Yeston, J.

American Association for the Advancement of Science (AAAS)

In: Science

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Publikationsdatum: 2018-07-27

Schlagwort(e): Chemistry

Print ISSN: 0036-8075

Digitale ISSN: 1095-9203

Thema: Biologie , Chemie und Pharmazie , Geologie und Paläontologie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik

Publiziert von American Association for the Advancement of Science (AAAS)

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22

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Teaching an old carbocation new tricks: Intermolecular C-H insertion reactions of vinyl cations (2018)

Popov, S., Shao, B., Bagdasarian, A. L., Benton, T. R., Zou, L., Yang, Z., Houk, K. N., Nelson, H. M.

American Association for the Advancement of Science (AAAS)

In: Science

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Publikationsdatum: 2018-07-27

Beschreibung: Vinyl carbocations have been the subject of extensive experimental and theoretical studies over the past five decades. Despite this long history in chemistry, the utility of vinyl cations in chemical synthesis has been limited, with most reactivity studies focusing on solvolysis reactions or intramolecular processes. Here we report synthetic and mechanistic studies of vinyl cations generated through silylium–weakly coordinating anion catalysis. We find that these reactive intermediates undergo mild intermolecular carbon-carbon bond–forming reactions, including carbon-hydrogen (C–H) insertion into unactivated sp 3 C–H bonds and reductive Friedel-Crafts reactions with arenes. Moreover, we conducted computational studies of these alkane C–H functionalization reactions and discovered that they proceed through nonclassical, ambimodal transition structures. This reaction manifold provides a framework for the catalytic functionalization of hydrocarbons using simple ketone derivatives.

Schlagwort(e): Chemistry

Print ISSN: 0036-8075

Digitale ISSN: 1095-9203

Thema: Biologie , Chemie und Pharmazie , Geologie und Paläontologie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik

Publiziert von American Association for the Advancement of Science (AAAS)

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23

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Phase transitions of a two-dimensional deformed Affleck-Kennedy-Lieb-Tasaki model (2018)

Nicholas Pomata, Ching-Yu Huang, and Tzu-Chieh Wei

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-28

Beschreibung: Author(s): Nicholas Pomata, Ching-Yu Huang, and Tzu-Chieh Wei We study spin-2 deformed-AKLT models on the square lattice, specifically a two-parameter family of O ( 2 ) -symmetric ground-state wave functions as defined by Niggemann, Klümper, and Zittartz, who found previously that the phase diagram consists of a Néel-ordered phase and a disordered phase which cont... [Phys. Rev. B 98, 014432] Published Fri Jul 27, 2018

Schlagwort(e): Magnetism

Print ISSN: 1098-0121

Digitale ISSN: 1095-3795

Thema: Physik

Publiziert von American Physical Society (APS)

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24

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Twisted skyrmions at domain boundaries and the method of image skyrmions (2018)

Huanhuan Yang, C. Wang, Xiaofan Wang, X. S. Wang, Yunshan Cao, and Peng Yan

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-28

Beschreibung: Author(s): Huanhuan Yang, C. Wang, Xiaofan Wang, X. S. Wang, Yunshan Cao, and Peng Yan We predict a twisted skyrmion structure at the boundary of two antiparallel magnetic domains stabilized by a (synthetic or crystal) antiferromagnetic coupling on the border. Through this novel state, skyrmions with opposite polarities can be freely switched between each other by spin-polarized elect... [Phys. Rev. B 98, 014433] Published Fri Jul 27, 2018

Schlagwort(e): Magnetism

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Ferromagnetic resonance in core-shell nanoparticles with multitype exchange anisotropy (2018)

I. S. Poperechny and Yu. L. Raikher

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-31

Beschreibung: Author(s): I. S. Poperechny and Yu. L. Raikher A phenomenological model for magnetodynamics of core-shell nanoparticles is presented. The term core-shell implies, prima facie , that the spin structures (phases) of the particle components are different, no matter whether or not they are chemically identical. The model takes in two main assumptions... [Phys. Rev. B 98, 014434] Published Mon Jul 30, 2018

Schlagwort(e): Magnetism

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Magnetic reversal in $\mathrm{S}{\mathrm{r}}_{4}\mathrm{R}{\mathrm{u}}_{3}{\mathrm{O}}_{10}$ nanosheets probed by anisotropic magnetoresistance (2018)

Yan Liu, Weiwei Chu, Jiyong Yang, Guoqiang Liu, Haifeng Du, Wei Ning, Langsheng Ling, Wei Tong, Zhe Qu, Gang Cao, Zhuan Xu, and Mingliang Tian

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-26

Beschreibung: Author(s): Yan Liu, Weiwei Chu, Jiyong Yang, Guoqiang Liu, Haifeng Du, Wei Ning, Langsheng Ling, Wei Tong, Zhe Qu, Gang Cao, Zhuan Xu, and Mingliang Tian The origin of the unusual second magnetic transition at a temperature T M in the ruthenate S r 4 R u 3 O 10 remains elusive. Here, we have investigated the thickness-dependent anisotropic magnetoresistance of S r 4 R u 3 O 10 nanosheets, and clearly found that the sign of the magnetoresistance (MR) presents an unu... [Phys. Rev. B 98, 024425] Published Wed Jul 25, 2018

Schlagwort(e): Magnetism

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Chiral skyrmions in an anisotropy gradient (2018)

R. Tomasello, S. Komineas, G. Siracusano, M. Carpentieri, and G. Finocchio

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-25

Beschreibung: Author(s): R. Tomasello, S. Komineas, G. Siracusano, M. Carpentieri, and G. Finocchio A strategy to drive skyrmion motion by a combination of an anisotropy gradient and spin-Hall effect has recently been demonstrated. Here, we study the fundamental properties of this type of motion by combining micromagnetic simulations and a generalized Thiele's equation. We find that the anisotropy... [Phys. Rev. B 98, 024421] Published Tue Jul 24, 2018

Schlagwort(e): Magnetism

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Domain formation in rectangular magnetic nanoparticle assemblies (2018)

Alexander Fabian, Michael Czerner, Christian Heiliger, Matthias T. Elm, Detlev M. Hofmann, and Peter J. Klar

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-02

Beschreibung: Author(s): Alexander Fabian, Michael Czerner, Christian Heiliger, Matthias T. Elm, Detlev M. Hofmann, and Peter J. Klar Rectangular assemblies with different aspect ratios were prepared with spherical magnetite nanoparticles (diameter d = 20 nm ) on lithographically patterned substrates using a variant of the meniscus force deposition method. The aspect ratio (width:length) of the rectangular assemblies was varied from v... [Phys. Rev. B 98, 054401] Published Wed Aug 01, 2018

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Detecting end states of topological quantum paramagnets via spin Hall noise spectroscopy (2018)

Darshan G. Joshi, Andreas P. Schnyder, and So Takei

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-02

Beschreibung: Author(s): Darshan G. Joshi, Andreas P. Schnyder, and So Takei We theoretically study the equilibrium spin current fluctuations and the corresponding charge noise generated by the inverse spin Hall effect (ISHE) in a metal with strong spin-orbit coupling deposited on top of a quantum paramagnet. It is shown that the charge noise power spectra measured along dif... [Phys. Rev. B 98, 064401] Published Wed Aug 01, 2018

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Nanoscale magnetic localization in exchange strength modulated ferromagnets (2018)

B. J. Kirby, L. Fallarino, P. Riego, B. B. Maranville, Casey W. Miller, and A. Berger

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-04

Beschreibung: Author(s): B. J. Kirby, L. Fallarino, P. Riego, B. B. Maranville, Casey W. Miller, and A. Berger Although ferromagnetism is in general a long-range collective phenomenon, it is possible to induce local spatial variations of magnetic properties in ferromagnetic materials. For example, systematic variation of the exchange coupling strength can be used to create systems that behave as if they are ... [Phys. Rev. B 98, 064404] Published Fri Aug 03, 2018

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Homogeneous and heterogeneous nucleation of skyrmions in thin layers of cubic helimagnets (2018)

A. O. Leonov and K. Inoue

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-07

Beschreibung: Author(s): A. O. Leonov and K. Inoue Formation of isolated chiral skyrmions by homogeneous and heterogeneous nucleation has been studied in thin layers of cubic helimagnets via elongation of torons and chiral bobbers, respectively. Both torons and bobbers are localized in three dimensions, contain singularities, and, according to the t... [Phys. Rev. B 98, 054404] Published Mon Aug 06, 2018

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Spin-wave dynamics in artificial anti-spin-ice systems: Experimental and theoretical investigations (2018)

S. Mamica, X. Zhou, A. Adeyeye, M. Krawczyk, and G. Gubbiotti

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-07

Beschreibung: Author(s): S. Mamica, X. Zhou, A. Adeyeye, M. Krawczyk, and G. Gubbiotti Reversed structures of artificial spin-ice systems, where elongated holes with elliptical shape (antidots) are arranged into a square array with two orthogonal sublattices, are referred to as antisquared spin ice. Using Brillouin light-scattering spectroscopy and plane-wave-method calculations, we i... [Phys. Rev. B 98, 054405] Published Mon Aug 06, 2018

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Metamagnetism and zero-scale-factor universality in the two-dimensional $J\text{−}Q$ model (2018)

Adam Iaizzi, Kedar Damle, and Anders W. Sandvik

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-07

Beschreibung: Author(s): Adam Iaizzi, Kedar Damle, and Anders W. Sandvik Using a combination of quantum Monte Carlo and exact methods, we study the field-driven saturation transition of the two-dimensional J − Q model, in which the antiferromagnetic Heisenberg exchange ( J ) coupling competes with an additional four-spin interaction ( Q ) that favors valence-bond solid order. ... [Phys. Rev. B 98, 064405] Published Mon Aug 06, 2018

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Observation of spontaneous ferriquadrupolar order in $\mathrm{KDy}{({\mathrm{MoO}}_{4})}_{2}$ (2018)

A. A. Zvyagin, K. Kutko, D. Kamenskyi, A. V. Peschanskii, S. Poperezhai, and N. M. Nesterenko

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-07

Beschreibung: Author(s): A. A. Zvyagin, K. Kutko, D. Kamenskyi, A. V. Peschanskii, S. Poperezhai, and N. M. Nesterenko Using Raman and infrared spectroscopies, spontaneous ferriquadrupolar ordering has been observed in the rare-earth-based system KDy ( MoO 4 ) 2 . Ordered quadrupoles in the electron subsystem attend nonequivalent distortions of rare-earth ions in the ordered phase. A mean-field theory explaining the onset... [Phys. Rev. B 98, 064406] Published Mon Aug 06, 2018

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Noncollinear magnetism in nanosized cobalt chromite (2018)

D. Zákutná, J. Vlček, P. Fitl, K. Nemkovski, D. Honecker, D. Nižňanský, and S. Disch

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-07

Beschreibung: Author(s): D. Zákutná, J. Vlček, P. Fitl, K. Nemkovski, D. Honecker, D. Nižňanský, and S. Disch Using a combination of neutron diffraction with XYZ polarization analysis and magnetization measurements, the noncollinear magnetism in nanosized cobalt chromite, a potential multiferroic material, is revealed. For noninteracting 26.9(1) nm nanoparticles, a bulklike behavior is identified, including... [Phys. Rev. B 98, 064407] Published Mon Aug 06, 2018

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Orbital magnetic quadrupole moment and nonlinear anomalous thermoelectric transport (2018)

Yang Gao and Di Xiao

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-07

Beschreibung: Author(s): Yang Gao and Di Xiao We present a microscopic theory of the orbital magnetic quadrupole moment density Q i j in periodic crystals with combined time-reversal ( T ) and inversion ( I ) symmetry. We obtain a gauge-invariant expression with a clear physical interpretation and demonstrate the typical behavior of Q i j in a minimal ... [Phys. Rev. B 98, 060402(R)] Published Mon Aug 06, 2018

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Magnetic anisotropy in permalloy: Hidden quantum mechanical features (2018)

Debora C. M. Rodrigues, Angela B. Klautau, Alexander Edström, Jan Rusz, Lars Nordström, Manuel Pereiro, Björgvin Hjörvarsson, and Olle Eriksson

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-05

Beschreibung: Author(s): Debora C. M. Rodrigues, Angela B. Klautau, Alexander Edström, Jan Rusz, Lars Nordström, Manuel Pereiro, Björgvin Hjörvarsson, and Olle Eriksson By means of relativistic, first principles calculations, we investigate the microscopic origin of the vanishingly low magnetic anisotropy of Permalloy, here proposed to be intrinsically related to the local symmetries of the alloy. It is shown that the local magnetic anisotropy of individual atoms i... [Phys. Rev. B 97, 224402] Published Mon Jun 04, 2018

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Intrinsic hysteresis due to the surface barrier for chiral solitons in monoaxial chiral helimagnets (2018)

M. Shinozaki, Y. Masaki, R. Aoki, Y. Togawa, and Y. Kato

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-14

Beschreibung: Author(s): M. Shinozaki, Y. Masaki, R. Aoki, Y. Togawa, and Y. Kato Chiral solitons in monoaxial chiral magnets undergo a surface barrier, which is analogous to the Bean-Livingston barrier in type-II superconductors. The authors argue here that the surface barrier is the main mechanism for large hysteresis observed in magnetoresistance (MR) measurements on micrometer-sized samples of CrNb 3 S 6 . In the MR hysteresis, a conspicuous jump is observed at the field H b for decreasing fields. Experimental results for H b ∼ 0 . 4 H c (with thermodynamic critical field H c ) and the theoretical result H b / H c = 4 / π 2 are in good agreement with each other. The surface barrier is regarded as a common property of systems (superconductors, chiral magnets, and chiral liquid crystals) that exhibit continuous transitions of the nucleation type. [Phys. Rev. B 97, 214413] Published Wed Jun 13, 2018

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Calculating the transport properties of magnetic materials from first principles including thermal and alloy disorder, noncollinearity, and spin-orbit coupling (2018)

Anton A. Starikov, Yi Liu, Zhe Yuan, and Paul J. Kelly

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-14

Beschreibung: Author(s): Anton A. Starikov, Yi Liu, Zhe Yuan, and Paul J. Kelly A density functional theory based two-terminal scattering formalism that includes spin-orbit coupling and spin noncollinearity is described. An implementation using tight-binding muffin-tin orbitals combined with extensive use of sparse matrix techniques allows a wide variety of inhomogeneous struct... [Phys. Rev. B 97, 214415] Published Wed Jun 13, 2018

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Field dependence of nonreciprocal magnons in chiral MnSi (2018)

T. Weber, J. Waizner, G. S. Tucker, R. Georgii, M. Kugler, A. Bauer, C. Pfleiderer, M. Garst, and P. Böni

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-06

Beschreibung: Author(s): T. Weber, J. Waizner, G. S. Tucker, R. Georgii, M. Kugler, A. Bauer, C. Pfleiderer, M. Garst, and P. Böni Spin waves in chiral magnetic materials are strongly influenced by the Dzyaloshinskii-Moriya interaction, resulting in intriguing phenomena like nonreciprocal magnon propagation and magnetochiral dichroism. Here, we study the nonreciprocal magnon spectrum of the archetypical chiral magnet MnSi and i... [Phys. Rev. B 97, 224403] Published Tue Jun 05, 2018

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Nonswitchable polarization and magnetoelectric coupling in the high-pressure synthesized doubly ordered perovskites $\mathrm{NaYMnW}{\mathrm{O}}_{6}$ and $\mathrm{NaHoCoW}{\mathrm{O}}_{6}$ (2018)

Chandan De and A. Sundaresan

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-15

Beschreibung: Author(s): Chandan De and A. Sundaresan The doubly ordered perovskites Na L n MnW O 6 ( L n = La , Nd, and Tb), Na L n FeW O 6 ( L n = La and Nd), and Na L n CoW O 6 ( L n = Sm − Er , Yb, and Y) have been reported to be potential multiferroics because of their polar crystal structure ( P 2 1 ) and antiferromagnetic ordering of the transition-metal ions at low temperatures.... [Phys. Rev. B 97, 214418] Published Thu Jun 14, 2018

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Electric and magnetic gating of Rashba-active weak links (2018)

A. Aharony, O. Entin-Wohlman, M. Jonson, and R. I. Shekhter

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-16

Beschreibung: Author(s): A. Aharony, O. Entin-Wohlman, M. Jonson, and R. I. Shekhter In a one-dimensional weak-link wire the spin-orbit interaction (SOI) alone cannot generate a nonzero spin current. We show that a Zeeman field acting in the wire in conjunction with the Rashba SOI there does yield such a current, whose magnitude and direction depend on the direction of the field. Wh... [Phys. Rev. B 97, 220404(R)] Published Fri Jun 15, 2018

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Magnetism and the phase diagram of ${\mathrm{MnSb}}_{2}{\mathrm{O}}_{6}$ (2018)

C. Koo, J. Werner, M. Tzschoppe, M. Abdel-Hafiez, P. K. Biswas, R. Sarkar, H.-H. Klauss, G. V. Raganyan, E. A. Ovchenkov, A. Yu. Nikulin, A. N. Vasiliev, E. A. Zvereva, and R. Klingeler

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-16

Beschreibung: Author(s): C. Koo, J. Werner, M. Tzschoppe, M. Abdel-Hafiez, P. K. Biswas, R. Sarkar, H.-H. Klauss, G. V. Raganyan, E. A. Ovchenkov, A. Yu. Nikulin, A. N. Vasiliev, E. A. Zvereva, and R. Klingeler Static and dynamic magnetic properties of P 3 ¯ 1 m -phase MnSb 2 O 6 have been studied by means of muon-spin relaxation ( μ SR ), high-frequency electron-spin resonance (HF-ESR), specific heat, and magnetization studies in magnetic fields up to 25 T. The data imply onset of long-range antiferromagnetic order ... [Phys. Rev. B 97, 224416] Published Fri Jun 15, 2018

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Scaling of nonlinear susceptibilities in an artificial permalloy honeycomb lattice (2018)

A. Dahal, Y. Chen, B. Summers, and D. K. Singh

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-19

Beschreibung: Author(s): A. Dahal, Y. Chen, B. Summers, and D. K. Singh Two-dimensional artificial magnetic honeycomb lattice is predicted to manifest several magnetic phase transitions as a function of reducing temperature. We have performed the analysis of nonlinear susceptibility to explore the equilibrium nature of phase transition in artificial honeycomb lattice of... [Phys. Rev. B 97, 214420] Published Mon Jun 18, 2018

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Spontaneous distortion via the appearance of ferromagnetism in Pd ultrathin films: Observation of an inverse mechanism for the Stoner criterion (2018)

Shunsuke Sakuragi, Hiroo Tajiri, Hiroyuki Kageshima, and Tetsuya Sato

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-19

Beschreibung: Author(s): Shunsuke Sakuragi, Hiroo Tajiri, Hiroyuki Kageshima, and Tetsuya Sato We study the crystal structure of Pd(100) ultrathin films, which show ferromagnetism induced by the quantum confinement effect, using in situ x-ray crystal truncation rod measurement and density functional calculation. The energy gain from the appearance of ferromagnetism in Pd results in flatter an... [Phys. Rev. B 97, 214421] Published Mon Jun 18, 2018

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Strong anomalous Nernst effect in collinear magnetic Weyl semimetals without net magnetic moments (2018)

Jonathan Noky, Jacob Gayles, Claudia Felser, and Yan Sun

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-19

Beschreibung: Author(s): Jonathan Noky, Jacob Gayles, Claudia Felser, and Yan Sun We predict a large anomalous Nernst effect in the inverse Heusler compensated ferrimagnets Ti 2 Mn X ( X = Al , Ga, and In) with vanishing net magnetic moments. Though the net magnetic moment is zero, the Weyl points in these systems lead to a large anomalous Nernst conductivity (ANC) due to the lack of a ... [Phys. Rev. B 97, 220405(R)] Published Mon Jun 18, 2018

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Spin glass in the bond-diluted ${J}_{1}−{J}_{2}$ Ising model on the square lattice (2018)

Yining Xu and Dao-Xin Yao

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-19

Beschreibung: Author(s): Yining Xu and Dao-Xin Yao We use Monte Carlo (MC) methods to simulate a two-dimensional (2D) bond-diluted Ising model on the square lattice, which has frustration between nearest-neighbor interaction J 1 and next-nearest-neighbor interaction J 2 . In this study, we use the parallel tempering algorithm to study thermodynamics fo... [Phys. Rev. B 97, 224419] Published Mon Jun 18, 2018

Schlagwort(e): Magnetism

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Finite-barrier correction for the ferromagnetic resonance frequency of nanomagnets with various magnetocrystalline anisotropies (2018)

Yuri P. Kalmykov, Serguey V. Titov, William T. Coffey, and William J. Dowling

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-19

Beschreibung: Author(s): Yuri P. Kalmykov, Serguey V. Titov, William T. Coffey, and William J. Dowling Finite-barrier corrections to the ferromagnetic resonance (FMR) frequency of nanomagnets are obtained in closed integral form from the undamped deterministic equation of motion of the magnetization by averaging the precession frequency as expressed by elliptic functions over all possible precessiona... [Phys. Rev. B 97, 224418] Published Mon Jun 18, 2018

Schlagwort(e): Magnetism

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Coupling of magnetic order and charge transport in the candidate Dirac semimetal ${\mathrm{EuCd}}_{2}{\mathrm{As}}_{2}$ (2018)

M. C. Rahn, J.-R. Soh, S. Francoual, L. S. I. Veiga, J. Strempfer, J. Mardegan, D. Y. Yan, Y. F. Guo, Y. G. Shi, and A. T. Boothroyd

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-21

Beschreibung: Author(s): M. C. Rahn, J.-R. Soh, S. Francoual, L. S. I. Veiga, J. Strempfer, J. Mardegan, D. Y. Yan, Y. F. Guo, Y. G. Shi, and A. T. Boothroyd We use resonant elastic x-ray scattering to determine the evolution of magnetic order in EuCd 2 As 2 below T N = 9.5 K, as a function of temperature and applied magnetic field. We find an A -type antiferromagnetic structure with in-plane magnetic moments, and observe dramatic magnetoresistive effects assoc... [Phys. Rev. B 97, 214422] Published Wed Jun 20, 2018

Schlagwort(e): Magnetism

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Separation of enantiomers by their enantiospecific interaction with achiral magnetic substrates (2018)

Banerjee-Ghosh, K., Ben Dor, O., Tassinari, F., Capua, E., Yochelis, S., Capua, A., Yang, S.-H., Parkin, S. S. P., Sarkar, S., Kronik, L., Baczewski, L. T., Naaman, R., Paltiel, Y.

American Association for the Advancement of Science (AAAS)

In: Science

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Publikationsdatum: 2018-06-22

Beschreibung: It is commonly assumed that recognition and discrimination of chirality, both in nature and in artificial systems, depend solely on spatial effects. However, recent studies have suggested that charge redistribution in chiral molecules manifests an enantiospecific preference in electron spin orientation. We therefore reasoned that the induced spin polarization may affect enantiorecognition through exchange interactions. Here we show experimentally that the interaction of chiral molecules with a perpendicularly magnetized substrate is enantiospecific. Thus, one enantiomer adsorbs preferentially when the magnetic dipole is pointing up, whereas the other adsorbs faster for the opposite alignment of the magnetization. The interaction is not controlled by the magnetic field per se, but rather by the electron spin orientations, and opens prospects for a distinct approach to enantiomeric separations.

Schlagwort(e): Chemistry

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Magnetic inhomogeneity in the copper pseudochalcogenide CuNCN (2018)

A. Zorko, P. Jeglič, M. Pregelj, D. Arčon, H. Luetkens, A. L. Tchougréeff, and R. Dronskowski

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-28

Beschreibung: Author(s): A. Zorko, P. Jeglič, M. Pregelj, D. Arčon, H. Luetkens, A. L. Tchougréeff, and R. Dronskowski Copper carbodiimide, CuNCN, is a geometrically frustrated nitrogen-based analog of cupric oxide, whose magnetism remains ambiguous. Here, we employ a combination of local-probe techniques, including Cu 63 , 65 nuclear quadrupole resonance, C 13 nuclear magnetic resonance, and muon spin rotation to show ... [Phys. Rev. B 97, 214432] Published Wed Jun 27, 2018

Schlagwort(e): Magnetism

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Inspiration from a vitamin (2018)

Funk, M. A.

American Association for the Advancement of Science (AAAS)

In: Science

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Publikationsdatum: 2018-06-29

Schlagwort(e): Chemistry

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Thema: Biologie , Chemie und Pharmazie , Geologie und Paläontologie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik

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Impact of interface structure on magnetic exchange coupling in $\mathrm{MnBi}/{\mathrm{Fe}}_{x}{\mathrm{Co}}_{1−x}$ bilayers (2018)

S. Sabet, A. Moradabadi, S. Gorji, M. Yi, Q. Gong, M. H. Fawey, E. Hildebrandt, D. Wang, H. Zhang, B.-X. Xu, C. Kübel, and L. Alff

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-11-30

Beschreibung: Author(s): S. Sabet, A. Moradabadi, S. Gorji, M. Yi, Q. Gong, M. H. Fawey, E. Hildebrandt, D. Wang, H. Zhang, B.-X. Xu, C. Kübel, and L. Alff Magnetic exchange coupling behavior was investigated in MnBi/FeCo bilayer system at the hard/soft magnetic interface. We performed a combined study of cross-sectional high resolution transmission electron microscopy (HR-TEM), DFT calculations, and micromagnetic simulations to elucidate effect of int... [Phys. Rev. B 98, 174440] Published Thu Nov 29, 2018

Schlagwort(e): Magnetism

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Nonequilibrium selection of magnetic order in a driven triangular XY antiferromagnet (2018)

Yuan Wan and Roderich Moessner

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-11-30

Beschreibung: Author(s): Yuan Wan and Roderich Moessner We show that a weak periodic drive removes the accidental degeneracy in the ground state of the XY antiferromagnet on the triangular lattice in a uniform static magnetic field. The underlying mechanism involves adding a small periodically modulated component to the magnetic field, which influences f... [Phys. Rev. B 98, 184432] Published Thu Nov 29, 2018

Schlagwort(e): Magnetism

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Stability of the skyrmion lattice near the critical temperature in cubic helimagnets (2018)

Victor Laliena, Germán Albalate, and Javier Campo

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-06

Beschreibung: Author(s): Victor Laliena, Germán Albalate, and Javier Campo The phase diagram of cubic helimagnets near the critical temperature is obtained from a Landau-Ginzburg model, including fluctuations to Gaussian level. The free energy is evaluated via a saddle-point expansion around the local minima of the Landau-Ginzburg functional. The local minima are computed ... [Phys. Rev. B 98, 224407] Published Wed Dec 05, 2018

Schlagwort(e): Magnetism

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Multiple-$Q$ magnetic orders in Rashba-Dresselhaus metals (2018)

Ken N. Okada, Yasuyuki Kato, and Yukitoshi Motome

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-06

Beschreibung: Author(s): Ken N. Okada, Yasuyuki Kato, and Yukitoshi Motome We study magnetic textures realized in noncentrosymmetric Kondo lattice models in which localized magnetic moments weakly interact with itinerant electrons subject to Rashba and Dresselhaus spin-orbit couplings. By virtue of state-of-the-art numerical simulations as well as variational calculations,... [Phys. Rev. B 98, 224406] Published Wed Dec 05, 2018

Schlagwort(e): Magnetism

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Colossal refrigerant capacity in $[\mathrm{Fe}{(\mathrm{hyptrz})}_{3}]{\mathrm{A}}_{2}·{\mathrm{H}}_{2}\mathrm{O}$ around the freezing temperature of water (2018)

P. J. von Ranke, B. P. Alho, R. M. Ribas, E. P. Nobrega, A. Caldas, V. S. R. de Sousa, M. V. Colaço, Lippy F. Marques, Daniel L. Rocco, and P. O. Ribeiro

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-06

Beschreibung: Author(s): P. J. von Ranke, B. P. Alho, R. M. Ribas, E. P. Nobrega, A. Caldas, V. S. R. de Sousa, M. V. Colaço, Lippy F. Marques, Daniel L. Rocco, and P. O. Ribeiro We report a giant barocaloric effect in the spin-crossover compound [ Fe ( hyptrz ) 3 ] A 2 · H 2 O with hyptzr = 4 -(3′-hydroxypropyl)-1,2,4-triazole and A = 4 -chlorobenzenesulfonate. The origin of the giant barocaloric effect comes from the strong coupling between the lattice vibration and the electronic states t 2 ... [Phys. Rev. B 98, 224408] Published Wed Dec 05, 2018

Schlagwort(e): Magnetism

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Field-induced quantum magnetism in the verdazyl-based charge-transfer salt $[o\text{−}\mathrm{MePy}\text{−}\mathrm{V}\text{−}{(p\text{−}\mathrm{Br})}_{2}]{\mathrm{FeCl}}_{4}$ (2018)

Y. Iwasaki, T. Kida, M. Hagiwara, T. Kawakami, Y. Kono, S. Kittaka, T. Sakakibara, Y. Hosokoshi, and H. Yamaguchi

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-08

Beschreibung: Author(s): Y. Iwasaki, T. Kida, M. Hagiwara, T. Kawakami, Y. Kono, S. Kittaka, T. Sakakibara, Y. Hosokoshi, and H. Yamaguchi We successfully synthesized a verdazyl-based charge-transfer salt [ o − MePy − V − ( p − Br ) 2 ] FeCl 4 , which has S V = 1 / 2 on the radical o − MePy − V − ( p − Br ) 2 and S Fe = 5 / 2 on the FeCl 4 anion. Ab initio molecular orbital calculations indicate the formation of an S V = 1 / 2 honeycomb lattice composed of three types of exchan... [Phys. Rev. B 98, 224411] Published Fri Dec 07, 2018

Schlagwort(e): Magnetism

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Vibrational properties and magnetic specific heat of the covalent chain antiferromagnet $\mathrm{RbFeS}{\mathrm{e}}_{2}$ (2018)

A. G. Kiiamov, Y. V. Lysogorskiy, F. G. Vagizov, L. R. Tagirov, D. A. Tayurskii, Z. Seidov, H.-A. Krug von Nidda, V. Tsurkan, D. Croitori, A. Günther, F. Mayr, and A. Loidl

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-11

Beschreibung: Author(s): A. G. Kiiamov, Y. V. Lysogorskiy, F. G. Vagizov, L. R. Tagirov, D. A. Tayurskii, Z. Seidov, H.-A. Krug von Nidda, V. Tsurkan, D. Croitori, A. Günther, F. Mayr, and A. Loidl The magnetic specific heat of RbFeS e 2 and the spin state of F e 3 + ions in the compound have been studied. Phonon dispersion and phonon density of states (PDOS), element specific and total, were evaluated from first-principles calculations. It is shown that iron atoms in quasi-one-dimensional chains h... [Phys. Rev. B 98, 214411] Published Mon Dec 10, 2018

Schlagwort(e): Magnetism

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Magnetic properties and field-driven dynamics of chiral domain walls in epitaxial ${\mathrm{Pt}\text{/}\mathrm{Co}\text{/}\mathrm{Au}}_{x}{\mathrm{Pt}}_{1−x}$ trilayers (2018)

Kowsar Shahbazi, Aleš Hrabec, Simone Moretti, Michael B. Ward, Thomas A. Moore, Vincent Jeudy, Eduardo Martinez, and Christopher H. Marrows

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-11

Beschreibung: Author(s): Kowsar Shahbazi, Aleš Hrabec, Simone Moretti, Michael B. Ward, Thomas A. Moore, Vincent Jeudy, Eduardo Martinez, and Christopher H. Marrows Chiral domain walls in ultrathin perpendicularly magnetized layers have a Néel structure stabilized by a Dzyaloshinskii-Moriya interaction (DMI) that is generated at the interface between the ferromagnet and a heavy metal. Different interface materials or properties are required above and below a fe... [Phys. Rev. B 98, 214413] Published Mon Dec 10, 2018

Schlagwort(e): Magnetism

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Antiferromagnetic order is possible in ternary quasicrystal approximants (2018)

A. Ishikawa, T. Fujii, T. Takeuchi, T. Yamada, Y. Matsushita, and R. Tamura

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-11

Beschreibung: Author(s): A. Ishikawa, T. Fujii, T. Takeuchi, T. Yamada, Y. Matsushita, and R. Tamura Eight years since the discovery of the binary antiferromagnetic (AFM) quasicrystal approximants C d 6 R [R. Tamura et al. , Phys. Rev. B 82 , 220201 (2010) ], we report the observation of an AFM transition in quasicrystal approximants Au-Al- R ( R = Gd and Tb), which represent examples of AFM in ternary quas... [Phys. Rev. B 98, 220403(R)] Published Mon Dec 10, 2018

Schlagwort(e): Magnetism

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Quantum critical nature of the short-range magnetic order in ${\mathrm{Sr}}_{2−x}{\mathrm{La}}_{x}{\mathrm{IrO}}_{4}$ (2018)

Steven T. Rodan, Sungwon Yoon, Suheon Lee, Kwang-Yong Choi, Gareoung Kim, Jong-Soo Rhyee, Akihiro Koda, Wei-Tin Chen, and Fangcheng Chou

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-11

Beschreibung: Author(s): Steven T. Rodan, Sungwon Yoon, Suheon Lee, Kwang-Yong Choi, Gareoung Kim, Jong-Soo Rhyee, Akihiro Koda, Wei-Tin Chen, and Fangcheng Chou We have investigated the nature of the short-range magnetic phase region of Sr 2 − x La x IrO 4 ( 0 ≤ x ≤ 0.14 ). This so-called spin-orbit Mott insulator's predicted transition to superconductivity with electron doping has remained elusive. Instead, short-range magnetism prevails over an extensive doping range ... [Phys. Rev. B 98, 214412] Published Mon Dec 10, 2018

Schlagwort(e): Magnetism

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Hybrid quantum-classical method for simulating high-temperature dynamics of nuclear spins in solids (2018)

Grigory A. Starkov and Boris V. Fine

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-13

Beschreibung: Author(s): Grigory A. Starkov and Boris V. Fine First-principles calculations of high-temperature spin dynamics in solids in the context of nuclear magnetic resonance (NMR) are a long-standing problem, whose conclusive solution can significantly advance the applications of NMR as a diagnostic tool for material properties. In this work, we propose... [Phys. Rev. B 98, 214421] Published Wed Dec 12, 2018

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Observation of the geometric phase effect in the H + HD -〉 H2 + D reaction (2018)

Yuan, D., Guan, Y., Chen, W., Zhao, H., Yu, S., Luo, C., Tan, Y., Xie, T., Wang, X., Sun, Z., Zhang, D. H., Yang, X.

American Association for the Advancement of Science (AAAS)

In: Science

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Publikationsdatum: 2018-12-14

Beschreibung: Theory has established the importance of geometric phase (GP) effects in the adiabatic dynamics of molecular systems with a conical intersection connecting the ground- and excited-state potential energy surfaces, but direct observation of their manifestation in chemical reactions remains a major challenge. Here, we report a high-resolution crossed molecular beams study of the H + HD -〉 H 2 + D reaction at a collision energy slightly above the conical intersection. Velocity map ion imaging revealed fast angular oscillations in product quantum state–resolved differential cross sections in the forward scattering direction for H 2 products at specific rovibrational levels. The experimental results agree with adiabatic quantum dynamical calculations only when the GP effect is included.

Schlagwort(e): Chemistry

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Thema: Biologie , Chemie und Pharmazie , Geologie und Paläontologie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik

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Comprehensive inelastic neutron scattering study of the multiferroic ${\mathrm{Mn}}_{1−x}{\mathrm{Co}}_{x}{\mathrm{WO}}_{4}$ (2018)

Jinchen Wang, R. S. Fishman, Yiming Qiu, J. A. Fernandez-Baca, Georg Ehlers, K.-C. Liang, Yaqi Wang, Bernd Lorenz, C. W. Chu, and Feng Ye

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-15

Beschreibung: Author(s): Jinchen Wang, R. S. Fishman, Yiming Qiu, J. A. Fernandez-Baca, Georg Ehlers, K.-C. Liang, Yaqi Wang, Bernd Lorenz, C. W. Chu, and Feng Ye Using high-resolution inelastic neutron scattering, we examine the spin dynamics of Mn 1 − x Co x WO 4 in the collinear AF1, the a c − b spiral AF2, and the a c cycloidal AF5 phases. The spin wave excitations are well described by a Heisenberg model with competing long-range exchange interactions ( J i up to 12t... [Phys. Rev. B 98, 214425] Published Fri Dec 14, 2018

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Full angular dependence of the spin Hall and ordinary magnetoresistance in epitaxial antiferromagnetic NiO(001)/Pt thin films (2018)

L. Baldrati, A. Ross, T. Niizeki, C. Schneider, R. Ramos, J. Cramer, O. Gomonay, M. Filianina, T. Savchenko, D. Heinze, A. Kleibert, E. Saitoh, J. Sinova, and M. Kläui

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-25

Beschreibung: Author(s): L. Baldrati, A. Ross, T. Niizeki, C. Schneider, R. Ramos, J. Cramer, O. Gomonay, M. Filianina, T. Savchenko, D. Heinze, A. Kleibert, E. Saitoh, J. Sinova, and M. Kläui Electrical readout of the orientation of an antiferromagnet by detecting the Néel vector is necessary to exploit this class of materials for applications. Here, the authors study bilayers of thin films of the epitaxial antiferromagnetic insulator NiO(001) and the heavy metal Pt. The observed three-dimensional angular dependence of the spin Hall magnetoresistance (SMR) is analyzed, considering the reversible field-induced redistribution of magnetostrictive antiferromagnetic S and T domains in the NiO(001). The authors find that a careful subtraction of the ordinary magnetoresistance contribution in Pt is crucial to determine the SMR amplitude and thus the Néel vector average orientation. [Phys. Rev. B 98, 024422] Published Tue Jul 24, 2018

Schlagwort(e): Magnetism

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Frustration and anisotropic exchange in ytterbium magnets with edge-shared octahedra (2018)

Jeffrey G. Rau and Michel J. P. Gingras

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-09

Beschreibung: Author(s): Jeffrey G. Rau and Michel J. P. Gingras We consider the structure of anisotropic exchange interactions in ytterbium-based insulating rare-earth magnets built from edge-sharing octahedra. We argue the features of trivalent ytterbium and this structural configuration allow for a semiquantitative determination of the different anisotropic ex... [Phys. Rev. B 98, 054408] Published Wed Aug 08, 2018

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Dynamics of a many-body quantum spin system caused by a sequence of pulses (2018)

A. A. Zvyagin

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-14

Beschreibung: Author(s): A. A. Zvyagin Exact results for time evolution of a many-body quantum system (a transverse field Ising spin chain) under the action of several pulses of an external field are obtained. Unlike the situation with a single pulse, the magnetization depends on time for the sequence of two pulses. For the two-pulse cas... [Phys. Rev. B 98, 054414] Published Mon Aug 13, 2018

Schlagwort(e): Magnetism

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Stabilization and modulation of the topological magnetic phase with a ${\mathbb{Z}}_{2}$-vortex lattice in the Kitaev-Heisenberg honeycomb model: The key role of the third-nearest-neighbor interaction (2018)

Xiaoyan Yao and Shuai Dong

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-14

Beschreibung: Author(s): Xiaoyan Yao and Shuai Dong The topologically nontrivial magnetic phase with a Z 2 -vortex ( Z 2 V ) lattice is investigated by simulation in the Kitaev-Heisenberg honeycomb model expanded by considering the second- and third-nearest-neighbor Heisenberg interactions ( J H 2 and J H 3 ). On the parameter region of the Z 2 V phase, a gradual ... [Phys. Rev. B 98, 054413] Published Mon Aug 13, 2018

Schlagwort(e): Magnetism

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Probing tunneling spin injection into graphene via bias dependence (2018)

Tiancong Zhu, Simranjeet Singh, Jyoti Katoch, Hua Wen, Kirill Belashchenko, Igor Žutić, and Roland K. Kawakami

American Physical Society (APS)

In: Physical Review B

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Beschreibung: Author(s): Tiancong Zhu, Simranjeet Singh, Jyoti Katoch, Hua Wen, Kirill Belashchenko, Igor Žutić, and Roland K. Kawakami The bias dependence of spin injection in graphene lateral spin valves is systematically studied to determine the factors affecting the tunneling spin injection efficiency. Three types of junctions are investigated, including MgO and hexagonal boron nitride (hBN) tunnel barriers and direct contacts. ... [Phys. Rev. B 98, 054412] Published Mon Aug 13, 2018

Schlagwort(e): Magnetism

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Optically excited spin pumping mediating collective magnetization dynamics in a spin valve structure (2018)

A. P. Danilov, A. V. Scherbakov, B. A. Glavin, T. L. Linnik, A. M. Kalashnikova, L. A. Shelukhin, D. P. Pattnaik, A. W. Rushforth, C. J. Love, S. A. Cavill, D. R. Yakovlev, and M. Bayer

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-14

Beschreibung: Author(s): A. P. Danilov, A. V. Scherbakov, B. A. Glavin, T. L. Linnik, A. M. Kalashnikova, L. A. Shelukhin, D. P. Pattnaik, A. W. Rushforth, C. J. Love, S. A. Cavill, D. R. Yakovlev, and M. Bayer An alternative method for spin pumping – injection of a pure spin current into a nonmagnetic material by the precessing magnetization in an adjacent ferromagnet – is demonstrated without the need to use microwaves. Femtosecond laser pulses trigger the magnetization precession in adjacent (Fe,Ga) layers separated by a 5-nm Cu spacer. The spin currents emerging from the two layers couple their magnetization, leading to superposition of the two collective modes, observed in time-resolved Kerr rotation measurements. For resonant precession frequencies in the (Fe,Ga) layers, the authors achieve strongly split decay rates of the collective modes, indicating a purely dissipative coupling. [Phys. Rev. B 98, 060406(R)] Published Mon Aug 13, 2018

Schlagwort(e): Magnetism

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Anomalous and regular transport in spin-$\frac{1}{2}$ chains: ac conductivity (2018)

R. J. Sánchez, V. K. Varma, and V. Oganesyan

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-14

Beschreibung: Author(s): R. J. Sánchez, V. K. Varma, and V. Oganesyan We study magnetization transport in anisotropic spin- 1 2 chains governed by the integrable XXZ model with and without integrability-breaking perturbations at high temperatures ( T → ∞ ) using a hybrid approach that combines exact sum rules with judiciously chosen Ansätze. In the integrable XXZ model we f... [Phys. Rev. B 98, 054415] Published Mon Aug 13, 2018

Schlagwort(e): Magnetism

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Tuning the $S=1/2$ square-lattice antiferromagnet $\mathrm{S}{\mathrm{r}}_{2}\mathrm{Cu}(\mathrm{T}{\mathrm{e}}_{1\text{−}x}{\mathrm{W}}_{x}){\mathrm{O}}_{6}$ from Néel order to quantum disorder to columnar order (2018)

O. Mustonen, S. Vasala, K. P. Schmidt, E. Sadrollahi, H. C. Walker, I. Terasaki, F. J. Litterst, E. Baggio-Saitovitch, and M. Karppinen

American Physical Society (APS)

In: Physical Review B

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Beschreibung: Author(s): O. Mustonen, S. Vasala, K. P. Schmidt, E. Sadrollahi, H. C. Walker, I. Terasaki, F. J. Litterst, E. Baggio-Saitovitch, and M. Karppinen The spin-1/2 square-lattice Heisenberg model is predicted to have a quantum disordered ground state when magnetic frustration is maximized by competing nearest-neighbor J 1 and next-nearest-neighbor J 2 interactions ( J 2 / J 1 ≈ 0.5 ) . The double perovskites S r 2 CuTe O 6 and S r 2 CuW O 6 are isostructural spin-1/2 ... [Phys. Rev. B 98, 064411] Published Mon Aug 13, 2018

Schlagwort(e): Magnetism

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Electronic structure and magnetic properties of ${\mathrm{Sr}}_{2}{\mathrm{CrReO}}_{6}/{\mathrm{BaTiO}}_{3}$ hybrid heterostructures (2018)

V. N. Antonov, S. Uba, L. Uba, L. V. Bekenov, and A. Bonda

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-16

Beschreibung: Author(s): V. N. Antonov, S. Uba, L. Uba, L. V. Bekenov, and A. Bonda We report on the electronic structure and magnetic properties of hybrid heterostructures of the ferromagnetic double perovskite Sr 2 CrReO 6 (SCRO) and ferroelectric BaTiO 3 (BTO) calculated in the GGA approach using the fully relativistic spin-polarized Dirac LMTO method. The electronic band structure ... [Phys. Rev. B 98, 064414] Published Wed Aug 15, 2018

Schlagwort(e): Magnetism

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Spin fluctuations in the light-induced high-spin state of cobalt valence tautomers (2018)

F. Caracciolo, M. Mannini, G. Poneti, M. Pregelj, N. Janša, D. Arčon, and P. Carretta

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-16

Beschreibung: Author(s): F. Caracciolo, M. Mannini, G. Poneti, M. Pregelj, N. Janša, D. Arčon, and P. Carretta We present a study of the static magnetic properties and spin dynamics in cobalt valence tautomers (VT), molecules where a low spin (LS) to high spin (HS) crossover driven by an intramolecular electron transfer can be controlled by the temperature, by the external pressure, or by light irradiation. ... [Phys. Rev. B 98, 054416] Published Wed Aug 15, 2018

Schlagwort(e): Magnetism

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Magnetic domain texture and the Dzyaloshinskii-Moriya interaction in Pt/Co/IrMn and Pt/Co/FeMn thin films with perpendicular exchange bias (2018)

Risalat A. Khan, Hans T. Nembach, Mannan Ali, Justin M. Shaw, Christopher H. Marrows, and Thomas A. Moore

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-16

Beschreibung: Author(s): Risalat A. Khan, Hans T. Nembach, Mannan Ali, Justin M. Shaw, Christopher H. Marrows, and Thomas A. Moore Antiferromagnetic materials present us with rich and exciting physics, which we can exploit to open new avenues in spintronic device applications. We explore perpendicularly magnetized exchange biased systems of Pt/Co/IrMn and Pt/Co/FeMn, where the crossover from paramagnetic to antiferromagnetic be... [Phys. Rev. B 98, 064413] Published Wed Aug 15, 2018

Schlagwort(e): Magnetism

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Photocatalytic upgrading of natural gas (2018)

Kanai, M.

American Association for the Advancement of Science (AAAS)

In: Science

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Publikationsdatum: 2018-08-17

Schlagwort(e): Chemistry

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Thema: Biologie , Chemie und Pharmazie , Geologie und Paläontologie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik

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Radically transforming light hydrocarbons (2018)

Yeston, J.

American Association for the Advancement of Science (AAAS)

In: Science

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Publikationsdatum: 2018-08-17

Schlagwort(e): Chemistry

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Stereodivergent synthesis of 1,4-dicarbonyls by traceless charge-accelerated sulfonium rearrangement (2018)

Kaldre, D., Klose, I., Maulide, N.

American Association for the Advancement of Science (AAAS)

In: Science

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Publikationsdatum: 2018-08-17

Beschreibung: The chemistry of the carbonyl group is essential to modern organic synthesis. The preparation of substituted, enantioenriched 1,3- or 1,5-dicarbonyls is well developed, as their disconnection naturally follows from the intrinsic polarity of the carbonyl group. By contrast, a general enantioselective access to quaternary stereocenters in acyclic 1,4-dicarbonyl systems remains an unresolved problem, despite the tremendous importance of 2,3-substituted 1,4-dicarbonyl motifs in natural products and drug scaffolds. Here we present a broad enantioselective and stereodivergent strategy to access acyclic, polysubstituted 1,4-dicarbonyls via acid-catalyzed [3,3]-sulfonium rearrangement starting from vinyl sulfoxides and ynamides. The stereochemistry at sulfur governs the absolute sense of chiral induction, whereas the double bond geometry dictates the relative configuration of the final products.

Schlagwort(e): Chemistry

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Four varieties of carbonyl sandwich (2018)

Yeston, J.

American Association for the Advancement of Science (AAAS)

In: Science

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Publikationsdatum: 2018-08-17

Schlagwort(e): Chemistry

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Selective functionalization of methane, ethane, and higher alkanes by cerium photocatalysis (2018)

Hu, A., Guo, J.-J., Pan, H., Zuo, Z.

American Association for the Advancement of Science (AAAS)

In: Science

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Publikationsdatum: 2018-08-17

Beschreibung: With the recent soaring production of natural gas, the use of methane and other light hydrocarbon feedstocks as starting materials in synthetic transformations is becoming increasingly economically attractive, although it remains chemically challenging. We report the development of photocatalytic C–H amination, alkylation, and arylation of methane, ethane, and higher alkanes under visible light irradiation at ambient temperature. High catalytic efficiency (turnover numbers up to 2900 for methane and 9700 for ethane) and selectivity were achieved using abundant, inexpensive cerium salts as photocatalysts. Ligand-to-metal charge transfer excitation generated alkoxy radicals from simple alcohols that in turn acted as hydrogen atom transfer catalysts. The mixed-phase gas/liquid reaction was adapted to continuous flow, enabling the efficient use of gaseous feedstocks in scalable photocatalytic transformations.

Schlagwort(e): Chemistry

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Anisotropy of exchange stiffness based on atomic-scale magnetic properties in the rare-earth permanent magnet ${\mathrm{Nd}}_{2}{\mathrm{Fe}}_{14}\mathrm{B}$ (2018)

Yuta Toga, Masamichi Nishino, Seiji Miyashita, Takashi Miyake, and Akimasa Sakuma

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-18

Beschreibung: Author(s): Yuta Toga, Masamichi Nishino, Seiji Miyashita, Takashi Miyake, and Akimasa Sakuma We examine the anisotropic properties of the exchange stiffness constant A for a rare-earth permanent magnet, Nd 2 Fe 14 B , by connecting analyses with two different scales of length, i.e., Monte Carlo (MC) method with an atomistic spin model and Landau-Lifshitz-Gilbert (LLG) equation with a continuous ... [Phys. Rev. B 98, 054418] Published Fri Aug 17, 2018

Schlagwort(e): Magnetism

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Phase diagram of dipolar-coupled XY moments on disordered square lattices (2018)

Dominik Schildknecht, Laura J. Heyderman, and Peter M. Derlet

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-23

Beschreibung: Author(s): Dominik Schildknecht, Laura J. Heyderman, and Peter M. Derlet The effects of dilution disorder and random-displacement disorder are analyzed for dipolar-coupled magnetic moments confined in a plane, which were originally placed on the square lattice. In order to distinguish the different phases, new order parameters are derived and parallel tempering Monte Car... [Phys. Rev. B 98, 064420] Published Wed Aug 22, 2018

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Why rare-earth ferromagnets are so rare: Insights from the $p$-wave Kondo model (2018)

Shadab Ahamed, Roderich Moessner, and Onur Erten

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-22

Beschreibung: Author(s): Shadab Ahamed, Roderich Moessner, and Onur Erten Magnetic exchange in Kondo lattice systems is of the Ruderman-Kittel-Kasuya-Yosida type, whose sign depends on the Fermi wave vector k F . In the simplest setting, for small k F , the interaction is predominately ferromagnetic, whereas it turns more antiferromagnetic with growing k F . It is remarkable th... [Phys. Rev. B 98, 054420] Published Tue Aug 21, 2018

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Hot lithium-oxygen batteries charge ahead (2018)

Feng, S., Lunger, J. R., Johnson, J. A., Shao-Horn, Y.

American Association for the Advancement of Science (AAAS)

In: Science

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Publikationsdatum: 2018-08-24

Schlagwort(e): Chemistry

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Thema: Biologie , Chemie und Pharmazie , Geologie und Paläontologie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik

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A preference for acids (2018)

Szuromi, P.

American Association for the Advancement of Science (AAAS)

In: Science

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Publikationsdatum: 2018-08-24

Schlagwort(e): Chemistry

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Probing short-range magnetic order in a geometrically frustrated magnet by means of the spin Seebeck effect (2018)

Changjiang Liu, Stephen M. Wu, John E. Pearson, J. Samuel Jiang, N. d'Ambrumenil, and Anand Bhattacharya

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-29

Beschreibung: Author(s): Changjiang Liu, Stephen M. Wu, John E. Pearson, J. Samuel Jiang, N. d'Ambrumenil, and Anand Bhattacharya The spin Seebeck effect (SSE) can be used for generating pure spin currents in insulating magnetic materials using thermal gradients. Here, the authors exploit the sensitivity of SSE to local magnetic correlations to probe magnetic short-range order (SRO) in a geometrically frustrated paramagnet Gd 3 Ga 5 O 12 (GGG). The authors find that the magnetic SRO in GGG exists at temperatures far above where the corresponding antiferromagnetic long-range order can be detected using neutron scattering. Many fundamentally interesting states such as quantum spin liquids and spin ice arise in geometrically frustrated magnets. However, characterizing magnetic order within these materials in the absence of long-range order has been technically challenging, with insights derived mostly from neutron scattering measurements. This work suggests that the SSE may be an effective probe of magnetic SRO in geometrically frustrated systems, complementary to neutron and x-ray scattering. [Phys. Rev. B 98, 060415(R)] Published Tue Aug 28, 2018

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Magnetic phases of skyrmion-hosting ${\mathrm{GaV}}_{4}{\mathrm{S}}_{8−y}{\mathrm{Se}}_{y}\phantom{\rule{4pt}{0ex}}(y=0,2,4,8)$ probed with muon spectroscopy (2018)

Kévin J. A. Franke, Benjamin M. Huddart, Thomas J. Hicken, Fan Xiao, Stephen J. Blundell, Francis L. Pratt, Marta Crisanti, Joel A. T. Barker, Stewart J. Clark, Aleš Štefančič, Monica Ciomaga Hatnean, Geetha Balakrishnan, and Tom Lancaster

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-28

Beschreibung: Author(s): Kévin J. A. Franke, Benjamin M. Huddart, Thomas J. Hicken, Fan Xiao, Stephen J. Blundell, Francis L. Pratt, Marta Crisanti, Joel A. T. Barker, Stewart J. Clark, Aleš Štefančič, Monica Ciomaga Hatnean, Geetha Balakrishnan, and Tom Lancaster We present the results of a muon-spin spectroscopy investigation of GaV 4 S 8 − y Se y with y = 0 , 2 , 4 , and 8. Zero-field measurements suggest that GaV 4 Se 8 and GaV 4 S 8 have distinct magnetic ground states, with the latter material showing an anomalous temperature dependence of the local magnetic field. It is n... [Phys. Rev. B 98, 054428] Published Mon Aug 27, 2018

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Signatures of gapless fermionic spinons on a strip of the kagome Heisenberg antiferromagnet (2018)

Amir M-Aghaei, Bela Bauer, Kirill Shtengel, and Ryan V. Mishmash

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-28

Beschreibung: Author(s): Amir M-Aghaei, Bela Bauer, Kirill Shtengel, and Ryan V. Mishmash The search for exotic quantum spin liquid states in simple yet realistic spin models remains a central challenge in the field of frustrated quantum magnetism. Here we consider the canonical nearest-neighbor kagome Heisenberg antiferromagnet restricted to a quasi-one-dimensional strip consisting enti... [Phys. Rev. B 98, 054430] Published Mon Aug 27, 2018

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First-principles prediction of sub-10-nm skyrmions in Pd/Fe bilayers on Rh(111) (2018)

Soumyajyoti Haldar, Stephan von Malottki, Sebastian Meyer, Pavel F. Bessarab, and Stefan Heinze

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-28

Beschreibung: Author(s): Soumyajyoti Haldar, Stephan von Malottki, Sebastian Meyer, Pavel F. Bessarab, and Stefan Heinze We show that stable skyrmions with diameters of a few nanometers can emerge in atomic Pd/Fe bilayers on the Rh(111) surface. Based on density functional theory we calculate the exchange and the Dzyaloshinskii-Moriya interaction as well as the magnetocrystalline anisotropy energy. The latter two term... [Phys. Rev. B 98, 060413(R)] Published Mon Aug 27, 2018

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Spin-wave analysis of the low-temperature thermal Hall effect in the candidate Kitaev spin liquid $α−{RuCl}_{3}$ (2018)

Jonathan Cookmeyer and Joel E. Moore

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-28

Beschreibung: Author(s): Jonathan Cookmeyer and Joel E. Moore Proposed effective Hamiltonians from the literature for the material α − RuCl 3 are used to compute the magnon thermal Hall conductivity κ x y using linear spin-wave theory for the magnetically ordered state. No model previously proposed that was tested explains the published experimental data. Models wi... [Phys. Rev. B 98, 060412(R)] Published Mon Aug 27, 2018

Schlagwort(e): Magnetism

Print ISSN: 1098-0121

Digitale ISSN: 1095-3795

Thema: Physik

Publiziert von American Physical Society (APS)

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Decoupled spin dynamics in the rare-earth orthoferrite ${\mathrm{YbFeO}}_{3}$: Evolution of magnetic excitations through the spin-reorientation transition (2018)

S. E. Nikitin, L. S. Wu, A. S. Sefat, K. A. Shaykhutdinov, Z. Lu, S. Meng, E. V. Pomjakushina, K. Conder, G. Ehlers, M. D. Lumsden, A. I. Kolesnikov, S. Barilo, S. A. Guretskii, D. S. Inosov, and A. Podlesnyak

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-28

Beschreibung: Author(s): S. E. Nikitin, L. S. Wu, A. S. Sefat, K. A. Shaykhutdinov, Z. Lu, S. Meng, E. V. Pomjakushina, K. Conder, G. Ehlers, M. D. Lumsden, A. I. Kolesnikov, S. Barilo, S. A. Guretskii, D. S. Inosov, and A. Podlesnyak In this paper, we present a comprehensive study of magnetic dynamics in the rare-earth orthoferrite YbFeO 3 at temperatures below and above the spin-reorientation (SR) transition T SR = 7.6 K , in magnetic fields applied along the a , b , and c axes. Using single-crystal inelastic neutron scattering, we obse... [Phys. Rev. B 98, 064424] Published Mon Aug 27, 2018

Schlagwort(e): Magnetism

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Critical behavior and magnetocaloric effect in ${\mathrm{Mn}}_{3}{\mathrm{Si}}_{2}{\mathrm{Te}}_{6}$ (2018)

Yu Liu (刘育) and C. Petrovic

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-28

Beschreibung: Author(s): Yu Liu (刘育) and C. Petrovic The critical properties and magnetocaloric effect of semiconducting ferrimagnet Mn 3 Si 2 Te 6 single crystals have been investigated by bulk magnetization and heat capacity around T c . Critical exponents β = 0.41 ± 0.01 with a critical temperature T c = 74.18 ± 0.08 K and γ = 1.21 ± 0.02 with T c = 74.35 ± 0.05 K are deduce... [Phys. Rev. B 98, 064423] Published Mon Aug 27, 2018

Schlagwort(e): Magnetism

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Successive Majorana topological transitions driven by a magnetic field in the Kitaev model (2018)

Joji Nasu, Yasuyuki Kato, Yoshitomo Kamiya, and Yukitoshi Motome

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-31

Beschreibung: Author(s): Joji Nasu, Yasuyuki Kato, Yoshitomo Kamiya, and Yukitoshi Motome We study quantum phase transitions in the honeycomb Kitaev model under a magnetic field, focusing on the topological nature of Majorana fermion excitations. We find a gapless phase between the low-field gapless quantum spin liquid and the high-field gapped forced-ferromagnetic state for the antiferr... [Phys. Rev. B 98, 060416(R)] Published Thu Aug 30, 2018

Schlagwort(e): Magnetism

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18 electrons and counting (2018)

Armentrout, P. B.

American Association for the Advancement of Science (AAAS)

In: Science

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Publikationsdatum: 2018-08-31

Schlagwort(e): Chemistry

Print ISSN: 0036-8075

Digitale ISSN: 1095-9203

Thema: Biologie , Chemie und Pharmazie , Geologie und Paläontologie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik

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Directional control of a processive molecular hopper (2018)

Qing, Y., Ionescu, S. A., Pulcu, G. S., Bayley, H.

American Association for the Advancement of Science (AAAS)

In: Science

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Publikationsdatum: 2018-08-31

Beschreibung: Intrigued by the potential of nanoscale machines, scientists have long attempted to control molecular motion. We monitored the individual 0.7-nanometer steps of a single molecular hopper as it moved in an electric field along a track in a nanopore controlled by a chemical ratchet. The hopper demonstrated characteristics desired in a moving molecule: defined start and end points, processivity, no chemical fuel requirement, directional motion, and external control. The hopper was readily functionalized to carry cargos. For example, a DNA molecule could be ratcheted along the track in either direction, a prerequisite for nanopore sequencing.

Schlagwort(e): Chemistry

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Thema: Biologie , Chemie und Pharmazie , Geologie und Paläontologie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik

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Stability of the spiral spin liquid in ${\mathrm{MnSc}}_{2}{\mathrm{S}}_{4}$ (2018)

Yasir Iqbal, Tobias Müller, Harald O. Jeschke, Ronny Thomale, and Johannes Reuther

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-09-01

Beschreibung: Author(s): Yasir Iqbal, Tobias Müller, Harald O. Jeschke, Ronny Thomale, and Johannes Reuther We investigate the stability of the spiral spin liquid phase in MnSc 2 S 4 against thermal and quantum fluctuations as well as against perturbing effects of longer-range interactions. Employing ab initio density functional theory (DFT) calculations we propose a realistic Hamiltonian for MnSc 2 S 4 , featur... [Phys. Rev. B 98, 064427] Published Fri Aug 31, 2018

Schlagwort(e): Magnetism

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Thema: Physik

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First-principles study of the magnetic interactions in honeycomb $\mathrm{N}{\mathrm{a}}_{2}\mathrm{Ir}{\mathrm{O}}_{3}$ (2018)

Y. S. Hou, J. H. Yang, H. J. Xiang, and X. G. Gong

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-09-05

Beschreibung: Author(s): Y. S. Hou, J. H. Yang, H. J. Xiang, and X. G. Gong Honeycomb iridate N a 2 Ir O 3 , a J eff = 1 / 2 magnet, is a potential platform for realizing quantum spin liquid. Many experiments have shown that its magnetic ground state is a zigzag antiferromagnetic order. However, there is still a lack of consensus on the theoretical model explaining such order, since i... [Phys. Rev. B 98, 094401] Published Tue Sep 04, 2018

Schlagwort(e): Magnetism

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Field-enhanced quantum fluctuation in an $S=\frac{1}{2}$ frustrated square lattice (2018)

H. Yamaguchi, Y. Sasaki, T. Okubo, M. Yoshida, T. Kida, M. Hagiwara, Y. Kono, S. Kittaka, T. Sakakibara, M. Takigawa, Y. Iwasaki, and Y. Hosokoshi

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-09-05

Beschreibung: Author(s): H. Yamaguchi, Y. Sasaki, T. Okubo, M. Yoshida, T. Kida, M. Hagiwara, Y. Kono, S. Kittaka, T. Sakakibara, M. Takigawa, Y. Iwasaki, and Y. Hosokoshi We present a new model compound with the S = 1 / 2 frustrated square lattice composed of the charge-transfer salt ( o -MePy-V) PF 6 . A b i n i t i o calculations indicate the formation of an S = 1 / 2 square lattice, in which six types of nearest-neighbor ferromagnetic and antiferromagnetic interactions cause frustrat... [Phys. Rev. B 98, 094402] Published Tue Sep 04, 2018

Schlagwort(e): Magnetism

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Twisted domain walls and skyrmions in perpendicularly magnetized multilayers (2018)

Ivan Lemesh and Geoffrey S. D. Beach

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-09-05

Beschreibung: Author(s): Ivan Lemesh and Geoffrey S. D. Beach We present an analytical theory to describe three-dimensional magnetic textures in perpendicularly magnetized magnetic multilayers that arise in the presence of magnetostatic interactions and the Dzyaloshinskii-Moriya interaction (DMI). We demonstrate that domain walls in multilayers develop a compl... [Phys. Rev. B 98, 104402] Published Tue Sep 04, 2018

Schlagwort(e): Magnetism

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