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Magnon spectra and strong spin-lattice coupling in magnetically frustrated MnB2O4 (B=Mn,V): Inelastic light-scattering studies (2014)

S. L. Gleason, T. Byrum, Y. Gim, A. Thaler, P. Abbamonte, G. J. Mac; Dougall, L. W. Martin, H. D. Zhou, and S. L. Cooper

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2014-04-04

Description: Author(s): S. L. Gleason, T. Byrum, Y. Gim, A. Thaler, P. Abbamonte, G. J. MacDougall, L. W. Martin, H. D. Zhou, and S. L. Cooper The ferrimagnetic spinels MnB2O4 (B=Mn,V) exhibit a similar series of closely spaced magnetic and structural phase transitions at low temperatures, reflecting both magnetic frustration and a strong coupling between the spin and lattice degrees of freedom. Careful studies of excitations in MnB2O4 (B=... [Phys. Rev. B 89, 134402] Published Thu Apr 03, 2014

Keywords: Magnetism

Print ISSN: 1098-0121

Electronic ISSN: 1095-3795

Topics: Physics

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Static and dynamic polar nanoregions in relaxor ferroelectric Ba(Ti_{1−x}Sn_{x})O_{3} system at high temperature (2012)

L. Xie, Y. L. Li, R. Yu, Z. Y. Cheng, X. Y. Wei, X. Yao, C. L. Jia, K. Urban, A. A. Bokov, Z.-G. Ye, and J. Zhu

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2012-01-31

Description: Author(s): L. Xie, Y. L. Li, R. Yu, Z. Y. Cheng, X. Y. Wei, X. Yao, C. L. Jia, K. Urban, A. A. Bokov, Z.-G. Ye, and J. Zhu Relaxor ferroelectrics are materials exhibiting dielectric dispersions in their maximum permittivity temperature without macroscopic phase transition into a ferroelectric state. Their exceptional properties are exploited in a variety of dielectric and piezoelectric applications. As it is generally b... [Phys. Rev. B 85, 014118] Published Mon Jan 30, 2012

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

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Formation of magnetic skyrmions with tunable properties in PdFe bilayer deposited on Ir(111) (2014)

E. Simon, K. Palotás, L. Rózsa, L. Udvardi, and L. Szunyogh

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2014-09-17

Description: Author(s): E. Simon, K. Palotás, L. Rózsa, L. Udvardi, and L. Szunyogh We perform an extensive study of the spin-configurations in a PdFe bilayer on Ir(111) in terms of ab initio and spin-model calculations. We use the spin-cluster expansion technique to obtain spin model parameters, and solve the Landau-Lifshitz-Gilbert equations at zero temperature. In particular, we... [Phys. Rev. B 90, 094410] Published Tue Sep 16, 2014

Keywords: Magnetism

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Surface-acoustic-wave-driven ferromagnetic resonance in (Ga,Mn)(As,P) epilayers (2014)

L. Thevenard, C. Gourdon, J. Y. Prieur, H. J. von Bardeleben, S. Vincent, L. Becerra, L. Largeau, and J.-Y. Duquesne

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2014-09-03

Description: Author(s): L. Thevenard, C. Gourdon, J. Y. Prieur, H. J. von Bardeleben, S. Vincent, L. Becerra, L. Largeau, and J.-Y. Duquesne Surface acoustic waves (SAW) were generated on a thin layer of the ferromagnetic semiconductor (Ga,Mn)(As,P). The out-of-plane uniaxial magnetic anisotropy of this dilute magnetic semiconductor is very sensitive to the strain of the layer, making it an ideal test material for the dynamic control of ... [Phys. Rev. B 90, 094401] Published Tue Sep 02, 2014

Keywords: Magnetism

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Modulating spin transfer torque switching dynamics with two orthogonal spin-polarizers by varying the cell aspect ratio (2014)

B. Lacoste, M. Marins de Castro, T. Devolder, R. C. Sousa, L. D. Buda-Prejbeanu, S. Auffret, U. Ebels, C. Ducruet, I. L. Prejbeanu, L. Vila, B. Rodmacq, and B. Dieny

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2014-12-02

Description: Author(s): B. Lacoste, M. Marins de Castro, T. Devolder, R. C. Sousa, L. D. Buda-Prejbeanu, S. Auffret, U. Ebels, C. Ducruet, I. L. Prejbeanu, L. Vila, B. Rodmacq, and B. Dieny We study in-plane magnetic tunnel junctions with additional perpendicular polarizer for subnanosecond-current-induced switching memories. The spin-transfer-torque switching dynamics was studied as a function of the cell aspect ratio both experimentally and by numerical simulations using the macrospi... [Phys. Rev. B 90, 224404] Published Mon Dec 01, 2014

Keywords: Magnetism

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Magnetic exchange interactions in B-, Si-, and As-doped Fe_{2}P from first-principles theory (2012)

E. K. Delczeg-Czirjak, Z. Gercsi, L. Bergqvist, O. Eriksson, L. Szunyogh, P. Nordblad, B. Johansson, and L. Vitos

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2012-06-29

Description: Author(s): E. K. Delczeg-Czirjak, Z. Gercsi, L. Bergqvist, O. Eriksson, L. Szunyogh, P. Nordblad, B. Johansson, and L. Vitos Di-iron phosphide (Fe 2 P) is a parent system for a set of magnetocaloric materials. Although the magnetic ordering temperature ( T C = 215 K) of the stoichiometric composition is too low for room-temperature magnetic refrigeration, the partial replacement of P with B, Si, or As elements results in a st... [Phys. Rev. B 85, 224435] Published Thu Jun 28, 2012

Keywords: Magnetism

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Diffractive imaging at large Fresnel number: Challenge of dynamic mesoscale imaging with hard x rays (2014)

John L. Barber, Cris W. Barnes, Richard L. Sandberg, and Richard L. Sheffield

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2014-05-13

Description: Author(s): John L. Barber, Cris W. Barnes, Richard L. Sandberg, and Richard L. Sheffield Real materials have structure at both the atomic or crystalline scale as well as at interfaces and defects at the larger scale of grains. There is a need for the study of materials at the “mesoscale,” the scale at which subgranular physical processes and intergranular organization couple to determin... [Phys. Rev. B 89, 184105] Published Mon May 12, 2014

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

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Local structural displacements across the structural phase transition in IrTe2: Order-disorder of dimers and role of Ir-Te correlations (2014)

B. Joseph, M. Bendele, L. Simonelli, L. Maugeri, S. Pyon, K. Kudo, M. Nohara, T. Mizokawa, and N. L. Saini

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2014-01-01

Description: Author(s): B. Joseph, M. Bendele, L. Simonelli, L. Maugeri, S. Pyon, K. Kudo, M. Nohara, T. Mizokawa, and N. L. Saini We have studied local structure of IrTe2 by Ir L3-edge extended x-ray absorption fine structure (EXAFS) measurements as a function of temperature to investigate origin of the observed structural phase transition at Ts∼270 K. The EXAFS results show an appearance of longer Ir-Te bond length (ΔR∼0.05 Å... [Phys. Rev. B 88, 224109] Published Tue Dec 31, 2013

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

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Towards single-molecule NMR detection and spectroscopy using single spins in diamond (2014)

V. S. Perunicic, L. T. Hall, D. A. Simpson, C. D. Hill, and L. C. L. Hollenberg

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2014-03-05

Description: Author(s): V. S. Perunicic, L. T. Hall, D. A. Simpson, C. D. Hill, and L. C. L. Hollenberg Nanomagnetometry using the nitrogen-vacancy (NV) center in diamond has attracted a great deal of interest due to its unique combination of room temperature operation, nanoscale resolution, and high sensitivity. One of the important goals for nanomagnetometry is to be able to detect nanoscale nuclear... [Phys. Rev. B 89, 054432] Published Thu Feb 27, 2014

Keywords: Magnetism

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Emergence of skyrmion lattices and bimerons in chiral magnetic thin films with nonmagnetic impurities (2014)

R. L. Silva, L. D. Secchin, W. A. Moura-Melo, A. R. Pereira, and R. L. Stamps

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2014-03-05

Description: Author(s): R. L. Silva, L. D. Secchin, W. A. Moura-Melo, A. R. Pereira, and R. L. Stamps Skyrmions are topologically protected field structures with particlelike characteristics that play important roles in several areas of science. Recently, skyrmions have been directly observed in chiral magnets. Here, we investigate the effects of pointlike nonmagnetic impurities on the distinct init... [Phys. Rev. B 89, 054434] Published Thu Feb 27, 2014

Keywords: Magnetism

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