Direct expressions for magnetic anisotropy constants

Daisuke Miura; Ryo Sasaki; Akimasa Sakuma

doi:10.7567/APEX.8.113003

Direct expressions for magnetic anisotropy constants

Daisuke Miura, Ryo Sasaki, Akimasa Sakuma

ENG - Applied Physics

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

Abstract

Direct expressions for the magnetic anisotropy constants are given at a finite temperature from a microscopic viewpoint. The present derivation assumes that the Hamiltonian is a linear function with respect to the magnetization direction. We discuss in detail the first-order anisotropy constant K1 and show that our present results reproduce previous results. We applied our method to Nd2Fe14B compounds and confirmed that the present method can reproduce the temperature dependence of the magnetocrystalline anisotoropy constants K₁, K₂, and K₃ well.

Original language	English
Article number	113003
Journal	Applied Physics Express
Volume	8
Issue number	11
DOIs	https://doi.org/10.7567/APEX.8.113003
Publication status	Published - 2015 Nov

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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abstract = "Direct expressions for the magnetic anisotropy constants are given at a finite temperature from a microscopic viewpoint. The present derivation assumes that the Hamiltonian is a linear function with respect to the magnetization direction. We discuss in detail the first-order anisotropy constant K1 and show that our present results reproduce previous results. We applied our method to Nd2Fe14B compounds and confirmed that the present method can reproduce the temperature dependence of the magnetocrystalline anisotoropy constants K1, K2, and K3 well.",

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AB - Direct expressions for the magnetic anisotropy constants are given at a finite temperature from a microscopic viewpoint. The present derivation assumes that the Hamiltonian is a linear function with respect to the magnetization direction. We discuss in detail the first-order anisotropy constant K1 and show that our present results reproduce previous results. We applied our method to Nd2Fe14B compounds and confirmed that the present method can reproduce the temperature dependence of the magnetocrystalline anisotoropy constants K1, K2, and K3 well.

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