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1

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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

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Thema: Physik

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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

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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

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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

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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

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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

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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

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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

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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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12

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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

Schlagwort(e): Magnetism

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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

Schlagwort(e): Magnetism

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Poetic and polemic (2018)

Livio, M.

American Association for the Advancement of Science (AAAS)

In: Science

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Publikationsdatum: 2018-08-03

Schlagwort(e): Physics

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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Cranking up the field (2018)

Stajic, J.

American Association for the Advancement of Science (AAAS)

In: Science

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Publikationsdatum: 2018-08-03

Schlagwort(e): Physics

Print ISSN: 0036-8075

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

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Scale-invariant magnetoresistance in a cuprate superconductor (2018)

Giraldo-Gallo, P., Galvis, J. A., Stegen, Z., Modic, K. A., Balakirev, F. F., Betts, J. B., Lian, X., Moir, C., Riggs, S. C., Wu, J., Bollinger, A. T., He, X., Bozovic, I., Ramshaw, B. J., McDonald, R. D., Boebinger, G. S., Shekhter, A.

American Association for the Advancement of Science (AAAS)

In: Science

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Publikationsdatum: 2018-08-03

Beschreibung: The anomalous metallic state in the high-temperature superconducting cuprates is masked by superconductivity near a quantum critical point. Applying high magnetic fields to suppress superconductivity has enabled detailed studies of the normal state, yet the direct effect of strong magnetic fields on the metallic state is poorly understood. We report the high-field magnetoresistance of thin-film La 2– x Sr x CuO 4 cuprate in the vicinity of the critical doping, 0.161 ≤ p ≤ 0.190. We find that the metallic state exposed by suppressing superconductivity is characterized by magnetoresistance that is linear in magnetic fields up to 80 tesla. The magnitude of the linear-in-field resistivity mirrors the magnitude and doping evolution of the well-known linear-in-temperature resistivity that has been associated with quantum criticality in high-temperature superconductors.

Schlagwort(e): Physics

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

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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

Schlagwort(e): Magnetism

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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

Schlagwort(e): Magnetism

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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

Schlagwort(e): Magnetism

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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

Schlagwort(e): Magnetism

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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

Schlagwort(e): Magnetism

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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

Schlagwort(e): Magnetism

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Thema: Physik

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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

Schlagwort(e): Magnetism

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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

Schlagwort(e): Magnetism

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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

Schlagwort(e): Magnetism

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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

Schlagwort(e): Magnetism

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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

Schlagwort(e): Magnetism

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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

Schlagwort(e): Magnetism

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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

Schlagwort(e): Magnetism

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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

Schlagwort(e): Magnetism

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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

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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

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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

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Time and place of electron exit (2018)

Yeston, J.

American Association for the Advancement of Science (AAAS)

In: Science

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Publikationsdatum: 2018-06-22

Schlagwort(e): Physics

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

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Tunable quantum criticality and super-ballistic transport in a "charge" Kondo circuit (2018)

Iftikhar, Z., Anthore, A., Mitchell, A. K., Parmentier, F. D., Gennser, U., Ouerghi, A., Cavanna, A., Mora, C., Simon, P., Pierre, F.

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Publikationsdatum: 2018-06-22

Beschreibung: Quantum phase transitions (QPTs) are ubiquitous in strongly correlated materials. However, the microscopic complexity of these systems impedes the quantitative understanding of QPTs. We observed and thoroughly analyzed the rich strongly correlated physics in two profoundly dissimilar regimes of quantum criticality. With a circuit implementing a quantum simulator for the three-channel Kondo model, we reveal the universal scalings toward different low-temperature fixed points and along the multiple crossovers from quantum criticality. An unanticipated violation of the maximum conductance for ballistic free electrons is uncovered. The present charge pseudospin implementation of a Kondo impurity opens access to a broad variety of strongly correlated phenomena.

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Orientation-dependent stereo Wigner time delay and electron localization in a small molecule (2018)

Vos, J., Cattaneo, L., Patchkovskii, S., Zimmermann, T., Cirelli, C., Lucchini, M., Kheifets, A., Landsman, A. S., Keller, U.

American Association for the Advancement of Science (AAAS)

In: Science

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Publikationsdatum: 2018-06-22

Beschreibung: Attosecond metrology of atoms has accessed the time scale of the most fundamental processes in quantum mechanics. Transferring the time-resolved photoelectric effect from atoms to molecules considerably increases experimental and theoretical challenges. Here we show that orientation- and energy-resolved measurements characterize the molecular stereo Wigner time delay. This observable provides direct information on the localization of the excited electron wave packet within the molecular potential. Furthermore, we demonstrate that photoelectrons resulting from the dissociative ionization process of the CO molecule are preferentially emitted from the carbon end for dissociative 2 states and from the center and oxygen end for the 2 states of the molecular ion. Supported by comprehensive theoretical calculations, this work constitutes a complete spatially and temporally resolved reconstruction of the molecular photoelectric effect.

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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

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Going beyond the first Chern number (2018)

Stajic, J.

American Association for the Advancement of Science (AAAS)

In: Science

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Publikationsdatum: 2018-06-29

Schlagwort(e): Physics

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Heterogeneous to homogeneous melting transition visualized with ultrafast electron diffraction (2018)

Mo, M. Z., Chen, Z., Li, R. K., Dunning, M., Witte, B. B. L., Baldwin, J. K., Fletcher, L. B., Kim, J. B., Ng, A., Redmer, R., Reid, A. H., Shekhar, P., Shen, X. Z., Shen, M., Sokolowski-Tinten, K., Tsui, Y. Y., Wang, Y. Q., Zheng, Q., Wang, X. J., Glenzer, S. H.

American Association for the Advancement of Science (AAAS)

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Publikationsdatum: 2018-06-29

Beschreibung: The ultrafast laser excitation of matters leads to nonequilibrium states with complex solid-liquid phase-transition dynamics. We used electron diffraction at mega–electron volt energies to visualize the ultrafast melting of gold on the atomic scale length. For energy densities approaching the irreversible melting regime, we first observed heterogeneous melting on time scales of 100 to 1000 picoseconds, transitioning to homogeneous melting that occurs catastrophically within 10 to 20 picoseconds at higher energy densities. We showed evidence for the heterogeneous coexistence of solid and liquid. We determined the ion and electron temperature evolution and found superheated conditions. Our results constrain the electron-ion coupling rate, determine the Debye temperature, and reveal the melting sensitivity to nucleation seeds.

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Observation of the topological Anderson insulator in disordered atomic wires (2018)

Meier, E. J., An, F. A., Dauphin, A., Maffei, M., Massignan, P., Hughes, T. L., Gadway, B.

American Association for the Advancement of Science (AAAS)

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Publikationsdatum: 2018-11-23

Beschreibung: Topology and disorder have a rich combined influence on quantum transport. To probe their interplay, we synthesized one-dimensional chiral symmetric wires with controllable disorder via spectroscopic Hamiltonian engineering, based on the laser-driven coupling of discrete momentum states of ultracold atoms. Measuring the bulk evolution of a topological indicator after a sudden quench, we observed the topological Anderson insulator phase, in which added disorder drives the band structure of a wire from topologically trivial to nontrivial. In addition, we observed the robustness of topologically nontrivial wires to weak disorder and measured the transition to a trivial phase in the presence of strong disorder. Atomic interactions in this quantum simulation platform may enable realizations of strongly interacting topological fluids.

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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

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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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Playing with particle physics (2018)

Chuang, A.

American Association for the Advancement of Science (AAAS)

In: Science

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Publikationsdatum: 2018-11-30

Schlagwort(e): Physics

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

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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

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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

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Making a practical valleytronics device (2018)

Stajic, J.

American Association for the Advancement of Science (AAAS)

In: Science

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Publikationsdatum: 2018-12-07

Schlagwort(e): Physics

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A valley valve and electron beam splitter (2018)

Li, J., Zhang, R.-X., Yin, Z., Zhang, J., Watanabe, K., Taniguchi, T., Liu, C., Zhu, J.

American Association for the Advancement of Science (AAAS)

In: Science

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Publikationsdatum: 2018-12-07

Beschreibung: Developing alternative paradigms of electronics beyond silicon technology requires the exploration of fundamentally new physical mechanisms, such as the valley-specific phenomena in hexagonal two-dimensional materials. We realize ballistic valley Hall kink states in bilayer graphene and demonstrate gate-controlled current transmission in a four-kink router device. The operations of a waveguide, a valve, and a tunable electron beam splitter are demonstrated. The valley valve exploits the valley-momentum locking of the kink states and reaches an on/off ratio of 8 at zero magnetic field. A magnetic field enables a full-range tunable coherent beam splitter. These results pave a path to building a scalable, coherent quantum transportation network based on the kink states.

Schlagwort(e): Physics

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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

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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

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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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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

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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

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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

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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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Publikationsdatum: 2018-08-14

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

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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

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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

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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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Publikationsdatum: 2018-08-14

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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More to imaging than meets the eye (2018)

Osborne, I. S.

American Association for the Advancement of Science (AAAS)

In: Science

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Publikationsdatum: 2018-08-17

Schlagwort(e): Physics

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

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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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Cooperative quantum magnetism (2018)

Osborne, I. S.

American Association for the Advancement of Science (AAAS)

In: Science

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Publikationsdatum: 2018-08-24

Schlagwort(e): Physics

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

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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

Schlagwort(e): Magnetism

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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

Schlagwort(e): Magnetism

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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

Schlagwort(e): Magnetism

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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

Schlagwort(e): Magnetism

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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

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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

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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

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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

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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

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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

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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

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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

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Large spin current generation by the spin Hall effect in mixed crystalline phase Ta thin films (2018)

Akash Kumar, Rajni Bansal, Sujeet Chaudhary, and Pranaba Kishor Muduli

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-09-05

Beschreibung: Author(s): Akash Kumar, Rajni Bansal, Sujeet Chaudhary, and Pranaba Kishor Muduli Manipulation of the magnetization in heavy-metal/ferromagnetic bilayers via the spin-orbit torque requires high spin Hall conductivity of the heavy metal. We measure inverse spin Hall voltage using a coplanar waveguide based broadband ferromagnetic resonance setup in the Py/Ta system with a varying ... [Phys. Rev. B 98, 104403] Published Tue Sep 04, 2018

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Magnetic dynamics and spin-phonon coupling in the antiferromagnet ${\mathrm{Ni}}_{2}{\mathrm{NbBO}}_{6}$ (2018)

M. A. Prosnikov, A. N. Smirnov, V. Yu. Davydov, R. V. Pisarev, N. A. Lyubochko, and S. N. Barilo

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-09-05

Beschreibung: Author(s): M. A. Prosnikov, A. N. Smirnov, V. Yu. Davydov, R. V. Pisarev, N. A. Lyubochko, and S. N. Barilo Antiferromagnetic systems with rich spin dynamics and pronounced interplay between magnetic and lattice degrees of freedom are of great interest in the emerging field of terahertz and subterahertz magnonics and spintronics. Here we report on spin and lattice dynamics of single crystals of Ni 2 NbBO 6 s... [Phys. Rev. B 98, 104404] Published Tue Sep 04, 2018

Schlagwort(e): Magnetism

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Nonlinear relaxation between magnons and phonons in insulating ferromagnets (2018)

Valerij A. Shklovskij, Viktoriia V. Mezinova, and Oleksandr V. Dobrovolskiy

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-09-05

Beschreibung: Author(s): Valerij A. Shklovskij, Viktoriia V. Mezinova, and Oleksandr V. Dobrovolskiy Nonlinear relaxation between spin waves (magnons) and the crystal lattice (phonons) in an insulating ferromagnet is investigated theoretically. Magnons and phonons are described by equilibrium Bose-Einstein distributions with different temperatures, T s 〉 T l . The magnon temperature is assumed to be ... [Phys. Rev. B 98, 104405] Published Tue Sep 04, 2018

Schlagwort(e): Magnetism

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Counter-rotating spiral order in three-dimensional iridates: Signature of hidden symmetry in the Kitaev-$\mathrm{Γ}$ model (2018)

P. Peter Stavropoulos, Andrei Catuneanu, and Hae-Young Kee

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-09-05

Beschreibung: Author(s): P. Peter Stavropoulos, Andrei Catuneanu, and Hae-Young Kee The unconventional magnetic orderings found in Kitaev spin liquid candidates suggest frustration of spin interactions and raise a possibility of nearby spin liquid phases. In particular, counter-rotating spiral ordering in three-dimensional (3D) iridates is striking, and understanding the microscopi... [Phys. Rev. B 98, 104401] Published Tue Sep 04, 2018

Schlagwort(e): Magnetism

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Unconventional planar Hall effect in exchange-coupled topological insulator–ferromagnetic insulator heterostructures (2018)

David Rakhmilevich, Fei Wang, Weiwei Zhao, Moses H. W. Chan, Jagadeesh S. Moodera, Chaoxing Liu, and Cui-Zu Chang

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-09-07

Beschreibung: Author(s): David Rakhmilevich, Fei Wang, Weiwei Zhao, Moses H. W. Chan, Jagadeesh S. Moodera, Chaoxing Liu, and Cui-Zu Chang The Dirac electrons occupying the surface states (SSs) of topological insulators (TIs) have been predicted to exhibit many exciting magnetotransport phenomena. Here we report the experimental observation of an unconventional planar Hall effect (PHE) and a gate-tunable hysteretic planar magnetoresist... [Phys. Rev. B 98, 094404] Published Thu Sep 06, 2018

Schlagwort(e): Magnetism

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Coexisting spinons and magnons in the frustrated zigzag spin-$\frac{1}{2}$ chain compound $β\text{−}{\mathrm{TeVO}}_{4}$ (2018)

M. Pregelj, O. Zaharko, U. Stuhr, A. Zorko, H. Berger, A. Prokofiev, and D. Arčon

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-09-07

Beschreibung: Author(s): M. Pregelj, O. Zaharko, U. Stuhr, A. Zorko, H. Berger, A. Prokofiev, and D. Arčon We investigate magnetic excitations in the frustrated zigzag spin-1/2 chain compound β − TeVO 4 by inelastic neutron scattering. In the magnetically ordered ground state, the excitation spectrum exhibits coexisting magnon dispersion, characteristic of long-range magnetic order, and a spinon-like contin... [Phys. Rev. B 98, 094405] Published Thu Sep 06, 2018

Schlagwort(e): Magnetism

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Stripe order and magnetic anisotropy in the $S=1$ antiferromagnet ${\mathrm{BaMoP}}_{2}{\mathrm{O}}_{8}$ (2018)

Jan Hembacher, Danis I. Badrtdinov, Lei Ding, Zuzanna Sobczak, Clemens Ritter, Vladimir V. Mazurenko, and Alexander A. Tsirlin

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-09-07

Beschreibung: Author(s): Jan Hembacher, Danis I. Badrtdinov, Lei Ding, Zuzanna Sobczak, Clemens Ritter, Vladimir V. Mazurenko, and Alexander A. Tsirlin Magnetic behavior of yavapaiite-type BaMoP 2 O 8 with the spatially anisotropic triangular arrangement of the S = 1 Mo 4 + ions is explored using thermodynamic measurements, neutron diffraction, and density-functional band-structure calculations. A broad maximum in the magnetic susceptibility around 46 K is... [Phys. Rev. B 98, 094406] Published Thu Sep 06, 2018

Schlagwort(e): Magnetism

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Independence of spin-orbit torques from the exchange bias direction in $\mathrm{N}{\mathrm{i}}_{81}\mathrm{F}{\mathrm{e}}_{19}/\mathrm{IrMn}$ bilayers (2018)

Hilal Saglam, J. Carlos Rojas-Sanchez, Sebastien Petit, Michel Hehn, Wei Zhang, John E. Pearson, Stephane Mangin, and Axel Hoffmann

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-09-08

Beschreibung: Author(s): Hilal Saglam, J. Carlos Rojas-Sanchez, Sebastien Petit, Michel Hehn, Wei Zhang, John E. Pearson, Stephane Mangin, and Axel Hoffmann We investigated a possible correlation between spin Hall angles and exchange bias in N i 81 F e 19 / IrMn samples by performing spin-torque ferromagnetic resonance measurements. This correlation is probed by patterning of N i 81 F e 19 / IrMn bilayers in different relative orientations with respect to the exchang... [Phys. Rev. B 98, 094407] Published Fri Sep 07, 2018

Schlagwort(e): Magnetism

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Computational investigation of inverse Heusler compounds for spintronics applications (2018)

Jianhua Ma, Jiangang He, Dipanjan Mazumdar, Kamaram Munira, Sahar Keshavarz, Tim Lovorn, C. Wolverton, Avik W. Ghosh, and William H. Butler

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-09-11

Beschreibung: Author(s): Jianhua Ma, Jiangang He, Dipanjan Mazumdar, Kamaram Munira, Sahar Keshavarz, Tim Lovorn, C. Wolverton, Avik W. Ghosh, and William H. Butler First-principles calculations of the electronic structure, magnetism, and structural stability of inverse Heusler compounds with the chemical formula X 2 Y Z are presented and discussed with a goal of identifying compounds of interest for spintronics. Compounds for which the number of electrons per ato... [Phys. Rev. B 98, 094410] Published Mon Sep 10, 2018

Schlagwort(e): Magnetism

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Chiral solitons in monoaxial chiral magnets in tilted magnetic field (2018)

Yusuke Masaki, Ryuya Aoki, Yoshihiko Togawa, and Yusuke Kato

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-09-11

Beschreibung: Author(s): Yusuke Masaki, Ryuya Aoki, Yoshihiko Togawa, and Yusuke Kato We show that the stability (existence/absence) and interaction (repulsion/attraction) of chiral solitons in monoaxial chiral magnets can be varied by tilting the direction of the magnetic field. We thereby elucidate that the condensation of attractive chiral solitons causes the discontinuous phase t... [Phys. Rev. B 98, 100402(R)] Published Mon Sep 10, 2018

Schlagwort(e): Magnetism

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Conical magnetic structures in multiferroic ${\mathrm{SrSc}}_{x}{\mathrm{Fe}}_{12−x}{\mathrm{O}}_{19}$ hexaferrites derived from powder neutron diffraction (2018)

N. Qureshi, M. D. Ruiz-Martín, I. Puente-Orench, M. T. Fernández-Díaz, A. M. Balbashov, V. Yu. Ivanov, V. Skumryev, and A. A. Mukhin

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-09-12

Beschreibung: Author(s): N. Qureshi, M. D. Ruiz-Martín, I. Puente-Orench, M. T. Fernández-Díaz, A. M. Balbashov, V. Yu. Ivanov, V. Skumryev, and A. A. Mukhin We present a systematic powder neutron diffraction study on Sr-based M -type hexaferrites SrSc x Fe 12 − x O 19 using high-resolution and high-flux instruments. We have derived the magnetic configurations for the compounds with x = 1.4 , 1.6, and 1.8 at room temperature and at 2 K revealing a ferrimagnetic str... [Phys. Rev. B 98, 094411] Published Tue Sep 11, 2018

Schlagwort(e): Magnetism

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Magnetic phase diagram of Ca-substituted $\mathrm{Eu}{\mathrm{Fe}}_{2}{\mathrm{As}}_{2}$ (2018)

L. M. Tran, M. Babij, L. Korosec, T. Shang, Z. Bukowski, and T. Shiroka

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-09-12

Beschreibung: Author(s): L. M. Tran, M. Babij, L. Korosec, T. Shang, Z. Bukowski, and T. Shiroka The simultaneous presence of an Fe-related spin-density wave and the antiferromagnetic order of Eu 2 + moments ranks EuFe 2 As 2 among the most interesting parent compounds of iron-based pnictide superconductors. Here we explore the consequences of the dilution of Eu 2 + magnetic lattice through on-site Ca... [Phys. Rev. B 98, 104412] Published Tue Sep 11, 2018

Schlagwort(e): Magnetism

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Assessing the SCAN functional for itinerant electron ferromagnets (2018)

M. Ekholm, D. Gambino, H. J. M. Jönsson, F. Tasnádi, B. Alling, and I. A. Abrikosov

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-09-12

Beschreibung: Author(s): M. Ekholm, D. Gambino, H. J. M. Jönsson, F. Tasnádi, B. Alling, and I. A. Abrikosov Density functional theory is a standard model for condensed-matter theory and computational material science. The accuracy of density functional theory is limited by the accuracy of the employed approximation to the exchange-correlation functional. Recently, the so-called strongly constrained approp... [Phys. Rev. B 98, 094413] Published Tue Sep 11, 2018

Schlagwort(e): Magnetism

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