Microscopic theory of directional-order-related magnetocrystalline anisotropy energy of L10-type alloys

Naofumi Kobayashi, Yohei Kota, Akimasa Sakuma

Research output: Contribution to journalArticle

Abstract

We have theoretically investigated the chemical order parameter (S) dependence of magnetocrystalline anisotropy energy (MAE) of L10-type alloys by means of the second-order perturbation in terms of the spin-orbit interaction (SOI) combined with the coherent potential approximation. Using some approximations, we obtained MAE ∝ S2 as well as the directional-order-induced magnetic anisotropy resulting from dipole-dipole interactions. The common feature that leads to this relation is the two-site interactions that reflect the polarity of atomic arrangements in the both anisotropy energies resulting from the SOI and the dipole-dipole interactions. In the case of MAE resulting from SOI, some approximations are needed owing to the presence of electron itineracy, which is neglected in the conventional scenario of directional-order-induced magnetic anisotropy.

Original languageEnglish
Article number094714
Journaljournal of the physical society of japan
Volume87
Issue number9
DOIs
Publication statusPublished - 2018 Jan 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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