Direct expressions for magnetic anisotropy constants. (20th October 2015)

• Record Type: Journal Article
• Authors: Miura, Daisuke; Sasaki, Ryo; Sakuma, Akimasa
• Is Part Of: Applied physics express. Volume 8:Number 11(2015:Nov.)
• Publication Date: 2015-10-20
• Subjects: Physics -- Periodicals; Technology -- Periodicals; 621.05
• DOI: 10.7567/APEX.8.113003
• Languages: English
• ISSNs: 1882-0778

Abstract

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 K 1 and show that our present results reproduce previous results. We applied our method to Nd2 Fe14 B compounds and confirmed that the present method can reproduce the temperature dependence of the magnetocrystalline anisotoropy constants K 1, K 2, and K 3 well.