Element-resolved magnetism across the temperature- and pressure-induced spin reorientation in MnBi
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS); Univ. of Illinois, Urbana-Champaign, IL (United States). Dept. of Geology
- Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
- Ames Lab., Ames, IA (United States)
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
- Carnegie Inst. of Washington, Argonne, IL (United States). Geophysical Lab.
- 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/
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.
- Research Organization:
- Ames Lab., Ames, IA (United States); Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- FG02-99ER45775; AC02-06CH11357; NA0001974; AC02-07CH1358; AC05-76RL01830
- OSTI ID:
- 1342924
- Alternate ID(s):
- OSTI ID: 1333604; OSTI ID: 1333993; OSTI ID: 1357208
- Report Number(s):
- IS-J-9161; PNNL-SA-118447; PRBMDO; TRN: US1701202
- Journal Information:
- Physical Review B, Vol. 94, Issue 18; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Giant magnetostriction effect near onset of spin reorientation in MnBi
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journal | May 2018 |
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