Effects of spin fluctuation on the magnetic anisotropy constant of itinerant electron magnets

Naofumi Kobayashi, Kazushige Hyodo, Akimasa Sakuma

研究成果: Article査読

7 被引用数 (Scopus)

抄録

In the disordered local moment picture, we calculated the magnetization (M) and magnetic anisotropy energy (MAE) of FePt, CoPt, and MnAl ordered alloys and a body-centered tetragonal FeCo (bct-FeCo) disordered alloy, assuming spatially fluctuated spin configurations at finite temperatures. All alloys exhibit the relation K1(T)/K1(0) = (M(T)/M(0))n with the exponent n 2. This is consistent with the two-ion anisotropy model, in contrast to the usual single-ion anisotropy model exhibiting n = 3. Because these systems have different mechanisms of MAE, we suggest that this relation is a general rule for itinerant electron systems.

本文言語English
論文番号100306
ジャーナルJapanese journal of applied physics
55
10
DOI
出版ステータスPublished - 2016 10

ASJC Scopus subject areas

  • 工学(全般)
  • 物理学および天文学(全般)

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