Spin-Fluctuation Mechanism of Anomalous Temperature Dependence of Magnetocrystalline Anisotropy in Itinerant Magnets

被引：23

作者：

Zhuravlev, I. A. ^{[1
,2
]}

Antropov, V. P. ^{[3
]}

Belashchenko, K. D. ^{[1
,2
]}

机构：

[1] Univ Nebraska, Dept Phys & Astron, Lincoln, NE 68588 USA

[2] Univ Nebraska, Nebraska Ctr Mat & Nanosci, Lincoln, NE 68588 USA

[3] US DOE, Ames Lab, Ames, IA 50011 USA

来源：

PHYSICAL REVIEW LETTERS | 2015年 / 115卷 / 21期

基金：

美国国家科学基金会;

关键词：

EXCHANGE INTERACTIONS; MAGNETIZATION; (FE1-XCOX)2B; ALLOYS; METALS;

D O I：

10.1103/PhysRevLett.115.217201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The origins of the anomalous temperature dependence of magnetocrystalline anisotropy in (Fe1-xCox)(2)B 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 due to these peculiar electronic mechanisms, which contrast starkly with those assumed in existing models.

引用

页数：5

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