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Title: Element-resolved magnetism across the temperature- and pressure-induced spin reorientation in MnBi

Abstract

Rare-earth free permanent magnet MnBi (NiAs-type crystal structure) displays strong uniaxial magnetic anisotropy above its similar to 90 K spin reorientation transition (SRT). X-ray magnetic circular dichroism (XMCD) measurements at the Mn K and Bi L-2,(3) edges show induced magnetism in Bi, which is strongly coupled to the magnetism of Mn. Temperature- and pressure-dependent XMCD results reveal that hydrostatic pressure mimics the effect of temperature, driving a transition from uniaxial to in-plane anisotropy. The pressure and temperature transitions are shown to be connected to an anisotropic lattice contraction in NiAs-type structures. Temperature and pressure, hence, induce coupled structural and magnetic responses, highlighting the importance of both anisotropic lattice change and Mn-Bi hybridization in leading to the magnetic anisotropy change across the SRT. The dependence of magnetic anisotropy on the anisotropic lattice change is confirmed by density functional theory.

Authors:
 [1];  [2];  [3];  [4];  [5];  [5];  [6];  [7];  [8];  [1];  [4]
  1. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
  2. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS); Univ. of Illinois, Urbana-Champaign, IL (United States). Dept. of Geology
  4. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
  5. Ames Lab., Ames, IA (United States)
  6. Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
  7. Carnegie Inst. of Washington, Argonne, IL (United States). Geophysical Lab.
  8. Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States. Materials Science and Engineering Dept/
Publication Date:
Research Org.:
Ames Lab., Ames, IA (United States); Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1342924
Alternate Identifier(s):
OSTI ID: 1333604; OSTI ID: 1333993; OSTI ID: 1357208
Report Number(s):
IS-J-9161; PNNL-SA-118447
Journal ID: ISSN 2469-9950; PRBMDO; TRN: US1701202
Grant/Contract Number:  
FG02-99ER45775; AC02-06CH11357; NA0001974; AC02-07CH1358; AC05-76RL01830
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 94; Journal Issue: 18; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; MnBi; spin reorientation; xmcd

Citation Formats

Choi, Yongseong, Jiang, Xiujuan, Bi, Wenli, Lapa, Pavel, Chouhan, Rajiv K., Paudyal, D., Varga, Tamas, Popov, Dmitry, Cui, Jun, Haskel, Daniel, and Jiang, J. S. Element-resolved magnetism across the temperature- and pressure-induced spin reorientation in MnBi. United States: N. p., 2016. Web. doi:10.1103/PhysRevB.94.184433.
Choi, Yongseong, Jiang, Xiujuan, Bi, Wenli, Lapa, Pavel, Chouhan, Rajiv K., Paudyal, D., Varga, Tamas, Popov, Dmitry, Cui, Jun, Haskel, Daniel, & Jiang, J. S. Element-resolved magnetism across the temperature- and pressure-induced spin reorientation in MnBi. United States. https://doi.org/10.1103/PhysRevB.94.184433
Choi, Yongseong, Jiang, Xiujuan, Bi, Wenli, Lapa, Pavel, Chouhan, Rajiv K., Paudyal, D., Varga, Tamas, Popov, Dmitry, Cui, Jun, Haskel, Daniel, and Jiang, J. S. Mon . "Element-resolved magnetism across the temperature- and pressure-induced spin reorientation in MnBi". United States. https://doi.org/10.1103/PhysRevB.94.184433. https://www.osti.gov/servlets/purl/1342924.
@article{osti_1342924,
title = {Element-resolved magnetism across the temperature- and pressure-induced spin reorientation in MnBi},
author = {Choi, Yongseong and Jiang, Xiujuan and Bi, Wenli and Lapa, Pavel and Chouhan, Rajiv K. and Paudyal, D. and Varga, Tamas and Popov, Dmitry and Cui, Jun and Haskel, Daniel and Jiang, J. S.},
abstractNote = {Rare-earth free permanent magnet MnBi (NiAs-type crystal structure) displays strong uniaxial magnetic anisotropy above its similar to 90 K spin reorientation transition (SRT). X-ray magnetic circular dichroism (XMCD) measurements at the Mn K and Bi L-2,(3) edges show induced magnetism in Bi, which is strongly coupled to the magnetism of Mn. Temperature- and pressure-dependent XMCD results reveal that hydrostatic pressure mimics the effect of temperature, driving a transition from uniaxial to in-plane anisotropy. The pressure and temperature transitions are shown to be connected to an anisotropic lattice contraction in NiAs-type structures. Temperature and pressure, hence, induce coupled structural and magnetic responses, highlighting the importance of both anisotropic lattice change and Mn-Bi hybridization in leading to the magnetic anisotropy change across the SRT. The dependence of magnetic anisotropy on the anisotropic lattice change is confirmed by density functional theory.},
doi = {10.1103/PhysRevB.94.184433},
journal = {Physical Review B},
number = 18,
volume = 94,
place = {United States},
year = {Mon Nov 28 00:00:00 EST 2016},
month = {Mon Nov 28 00:00:00 EST 2016}
}

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Works referencing / citing this record:

Giant magnetostriction effect near onset of spin reorientation in MnBi
journal, May 2018

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