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

Abstract

The origins of the anomalous temperature dependence of magnetocrystalline anisotropy in (Fe 1–xCo x) 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.

Authors:
 [1];  [2];  [1]
  1. Univ. of Nebraska-Lincoln, Lincoln, NE (United States)
  2. Ames Lab., Ames, IA (United States)
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1227443
Alternate Identifier(s):
OSTI ID: 1226094
Report Number(s):
IS-J-8818
Journal ID: ISSN 0031-9007; PRLTAO
Grant/Contract Number:  
DMR1308751; AC02-07CH11358
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 115; Journal Issue: 21; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Zhuravlev, I. A., Antropov, V. P., and Belashchenko, K. D. Spin-fluctuation mechanism of anomalous temperature dependence of magnetocrystalline anisotropy in itinerant magnets. United States: N. p., 2015. Web. doi:10.1103/PhysRevLett.115.217201.
Zhuravlev, I. A., Antropov, V. P., & Belashchenko, K. D. Spin-fluctuation mechanism of anomalous temperature dependence of magnetocrystalline anisotropy in itinerant magnets. United States. doi:10.1103/PhysRevLett.115.217201.
Zhuravlev, I. A., Antropov, V. P., and Belashchenko, K. D. Mon . "Spin-fluctuation mechanism of anomalous temperature dependence of magnetocrystalline anisotropy in itinerant magnets". United States. doi:10.1103/PhysRevLett.115.217201. https://www.osti.gov/servlets/purl/1227443.
@article{osti_1227443,
title = {Spin-fluctuation mechanism of anomalous temperature dependence of magnetocrystalline anisotropy in itinerant magnets},
author = {Zhuravlev, I. A. and Antropov, V. P. and Belashchenko, K. D.},
abstractNote = {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.},
doi = {10.1103/PhysRevLett.115.217201},
journal = {Physical Review Letters},
number = 21,
volume = 115,
place = {United States},
year = {2015},
month = {11}
}

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Cited by: 6 works
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