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Title: Spin-fluctuation mechanism of anomalous temperature dependence of magnetocrystalline anisotropy in itinerant magnets

Journal Article · · Physical Review Letters
 [1];  [2];  [1]
  1. Univ. of Nebraska-Lincoln, Lincoln, NE (United States)
  2. 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
Citation Metrics:
Cited by: 21 works
Citation information provided by
Web of Science

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Cited By (7)

Giant magnetostriction effect near onset of spin reorientation in MnBi journal May 2018
Perpendicular magnetic anisotropy in bulk and thin-film CuMnAs for antiferromagnetic memory applications journal October 2018
Single-Crystal Permanent Magnets: Extraordinary Magnetic Behavior in the Ta -, Cu -, and Fe -Substituted Ce Co 5 Systems journal January 2019
Interfacial spin Hall effect and spin swapping in Fe-Au bilayers from first principles journal April 2019
Electronic transport and phonon properties of maximally disordered alloys: From binaries to high-entropy alloys journal September 2018
Interfacial spin Hall effect and spin swapping in Fe|Au bilayer from first principles text January 2018
Perpendicular magnetic anisotropy in bulk and thin-film CuMnAs for antiferromagnetic memory applications text January 2018

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