Spin-fluctuation mechanism of anomalous temperature dependence of magnetocrystalline anisotropy in itinerant magnets
Journal Article
·
· Physical Review Letters
- Univ. of Nebraska-Lincoln, Lincoln, NE (United States)
- Ames Lab., Ames, IA (United States)
The origins of the anomalous temperature dependence of magnetocrystalline anisotropy in (Fe1–xCox)2B alloys are elucidated using first-principles calculations within the disordered local moment model. Excellent agreement with experimental data is obtained. The anomalies are associated with the changes in band occupations due to Stoner-like band shifts and with the selective suppression of spin-orbit “hot spots” by thermal spin fluctuations. Under certain conditions, the anisotropy can increase, rather than decrease, with decreasing magnetization. These peculiar electronic mechanisms are in stark contrast to the assumptions of the existing models.
- Research Organization:
- Ames Laboratory (AMES), Ames, IA (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- DMR1308751; AC02-07CH11358
- OSTI ID:
- 1227443
- Alternate ID(s):
- OSTI ID: 1226094
- Report Number(s):
- IS-J-8818; PRLTAO
- Journal Information:
- Physical Review Letters, Vol. 115, Issue 21; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 21 works
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