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Thermal response of nanoscale cylindrical inclusions of amorphous silica embedded in α-quartz (2014)

B. Afra, K. Nordlund, M. D. Rodriguez, T. Bierschenk, C. Trautmann, S. Mudie, and P. Kluth

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2014-12-31

Description: Author(s): B. Afra, K. Nordlund, M. D. Rodriguez, T. Bierschenk, C. Trautmann, S. Mudie, and P. Kluth The thermal response of nanoscale cylindrical inclusions of amorphous SiO 2 embedded in crystalline quartz ( c-SiO 2 ) is investigated by means of small-angle x-ray scattering. The inclusions are generated by swift heavy-ion irradiation that leads to the formation of amorphous ion tracks along the ion t... [Phys. Rev. B 90, 224108] Published Tue Dec 30, 2014

Keywords: Structure, structural phase transitions, mechanical properties, defects

Print ISSN: 1098-0121

Electronic ISSN: 1095-3795

Topics: Physics

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Doping control of realization of an extended Nagaoka ferromagnetic state from the Mott state (2014)

Hiroaki Onishi and Seiji Miyashita

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2014-12-31

Description: Author(s): Hiroaki Onishi and Seiji Miyashita Inspired by the Nagaoka ferromagnetism, we propose an itinerant model to study the transition between the Mott singlet state and a ferromagnetic state by emulating a doping process in finite lattices. In the Nagaoka ferromagnetism, the total spin of the system takes the maximum value when an electro... [Phys. Rev. B 90, 224426] Published Tue Dec 30, 2014

Keywords: Magnetism

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Space group symmetries of the phases of (Pb_{0.94}Sr_{0.06})(Zr_{x}Ti_{1−x})O_{3} across the antiferrodistortive phase transition in the composition range 0.620≲x≲0.940 (2014)

Ravindra Singh Solanki, Anatoliy Senyshyn, and Dhananjai Pandey

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2014-12-30

Description: Author(s): Ravindra Singh Solanki, Anatoliy Senyshyn, and Dhananjai Pandey The existing controversies about the space group symmetries of Pb(Zr x Ti 1−x )O 3 (PZT) above and below the antiferrodistortive (AFD) phase-transition temperature (T AFD ) in the Zr 4+ -rich (0.620≲x≲0.940) compositions are addressed using the results of dielectric, synchrotron x-ray powder diffraction (SXR... [Phys. Rev. B 90, 214110] Published Mon Dec 29, 2014

Keywords: Structure, structural phase transitions, mechanical properties, defects

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Magnetic field influence on the Néel, dimer, and spin-liquid states of the low-dimensional antiferromagnets NiTa_{2}O_{6} and CoSb_{2}O_{6} (2014)

A. B. Christian, S. H. Masunaga, A. T. Schye, A. Rebello, J. J. Neumeier, and Yi-Kuo Yu

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2014-12-30

Description: Author(s): A. B. Christian, S. H. Masunaga, A. T. Schye, A. Rebello, J. J. Neumeier, and Yi-Kuo Yu Magnetic susceptibility and heat capacity measurements are used to infer information about the short-range magnetic order above the Néel temperature T N and the antiferromagnetically ordered states below T N of quasi-one-dimensional (quasi-1D) CuSb 2 O 6 , NiTa 2 O 6 , and CoSb 2 O 6 . It is shown that two antife... [Phys. Rev. B 90, 224423] Published Mon Dec 29, 2014

Keywords: Magnetism

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Neutron diffraction study of magnetic order in NdFe_{2}Al_{10} (2014)

Julien Robert, Françoise Damay, Kotaro Saito, Alexandre M. Bataille, Florence Porcher, Gilles André, Arsen Gukasov, Jean-Michel Mignot, Hiroshi Tanida, and Masafumi Sera

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2014-12-30

Description: Author(s): Julien Robert, Françoise Damay, Kotaro Saito, Alexandre M. Bataille, Florence Porcher, Gilles André, Arsen Gukasov, Jean-Michel Mignot, Hiroshi Tanida, and Masafumi Sera The orthorhombic compound NdFe 2 Al 10 has been studied by powder and single-crystal neutron diffraction. Below T N =3.9 K, the Nd 3+ magnetic moments order in a double-k [k 1 =(0,3/4,0), k 2 =(0,1/4,0)] collinear magnetic structure, whose unit cell consists of four orthorhombic units in the b direction. The ... [Phys. Rev. B 90, 224425] Published Mon Dec 29, 2014

Keywords: Magnetism

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Probing magnetoelastic effects of ultrathin antiferromagnets via magnetic domain imaging in ferromagnetic-antiferromagnetic bilayers (2014)

Bo-Yao Wang, Jhen-Yong Hong, Nae-Yeou Jih, Kui-Hon Ou Yang, Li-Ren Chen, Hong-Ji Lin, Yuet-Loy Chan, Der-Hsin Wei, and Minn-Tsong Lin

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2014-12-30

Description: Author(s): Bo-Yao Wang, Jhen-Yong Hong, Nae-Yeou Jih, Kui-Hon Ou Yang, Li-Ren Chen, Hong-Ji Lin, Yuet-Loy Chan, Der-Hsin Wei, and Minn-Tsong Lin We report an experimental investigation of the magnetoelastic effects of ultrathin antiferromagnets, performed by comparing the characteristic behavior of the induced spin-reorientation transition (SRT) of Co films in two types of epitaxially grown bilayers: face-centered-cubic (fcc)–like Mn/Co (fcc... [Phys. Rev. B 90, 224424] Published Mon Dec 29, 2014

Keywords: Magnetism

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Analogous stress and electric field driven structural transformation and decrease in polarization coherence on poling around the morphotropic phase boundary in BiScO_{3}-PbTiO_{3} (2014)

Lalitha K. V., Ajay Kumar Kalyani, and Rajeev Ranjan

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2014-12-30

Description: Author(s): Lalitha K. V., Ajay Kumar Kalyani, and Rajeev Ranjan The nature of the stress and electric field driven structural and microstructural transformations in the morphotropic phase boundary (MPB) compositions of the high Curie point piezoelectric system BiScO 3 -PbTiO 3 has been examined by ex situ based techniques. Using a powder poling technique, which is ... [Phys. Rev. B 90, 224107] Published Mon Dec 29, 2014

Keywords: Structure, structural phase transitions, mechanical properties, defects

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Spin-modulated torque waves in ferrimagnetic tunnel junctions (2014)

P. Merodio, A. Kalitsov, H. Béa, V. Baltz, and M. Chshiev

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2014-12-25

Description: Author(s): P. Merodio, A. Kalitsov, H. Béa, V. Baltz, and M. Chshiev Spin-transfer torque (STT) in tunnel junctions with ferromagnetic leads is one of the essential underlying phenomena of modern spintronics. Here, we present a theoretical study of STT in ferrimagnet- (FI-) based tunnel junctions where two FI metal electrodes are separated by a thin nonmagnetic insul... [Phys. Rev. B 90, 224422] Published Wed Dec 24, 2014

Keywords: Magnetism

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Rotational motion of a magnetic vortex in a circular disk induced by injection of an electric current through an off-centered point contact (2014)

Hiroshi Tsukahara and Hiroshi Imamura

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2014-12-25

Description: Author(s): Hiroshi Tsukahara and Hiroshi Imamura The dynamics of a magnetic vortex in a circular disk with an off-centered point contact is theoretically studied based on Thiele's equation and two-vortices model. It is shown that the steady-state rotational motion of a vortex core is induced by an electric current, and the threshold current of thi... [Phys. Rev. B 90, 214437] Published Wed Dec 24, 2014

Keywords: Magnetism

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Nanoscale phase quantification in lead-free (Bi_{1/2}Na_{1/2})TiO_{3}-BaTiO_{3} relaxor ferroelectrics by means of ^{23}Na NMR (2014)

Pedro B. Groszewicz, Hergen Breitzke, Robert Dittmer, Eva Sapper, Wook Jo, Gerd Buntkowsky, and Jürgen Rödel

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2014-12-25

Description: Author(s): Pedro B. Groszewicz, Hergen Breitzke, Robert Dittmer, Eva Sapper, Wook Jo, Gerd Buntkowsky, and Jürgen Rödel We address the unsolved question on the structure of relaxor ferroelectrics at the atomic level by characterizing lead-free piezoceramic solid solutions (100−x)(Bi 1/2 Na 1/2 )TiO 3 -xBaTiO 3 (BNT-xBT) (for x=1, 4, 6, and 15). Based on the relative intensity between spectral components in quadrupolar pertu... [Phys. Rev. B 90, 220104] Published Wed Dec 24, 2014

Keywords: Structure, structural phase transitions, mechanical properties, defects

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