Measurement of Cubic Anisotropy in (111)-Oriented Garnet Films

概要

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This paper describes a simple method for measuring the cubic anisotropy in garnet films. In (111)-oriented garnet films, the magnetization M is rotated from the film normal to the film plane by applying an in-plane field H_<//>. The [111] component M_z of the magnetization M is measured magneto-optically. A plot of M_zH_<//> vs. M_z. yields an approximately linear relation where the intercept of the line on the M_zH_<//> axis changes with the direction of H_<//>, Thus, the cubic anisotropy K_1 as well as the uniaxial anisotropy K_u can be estimated from the slope and the intercepts of the extrapolated straight lines for different directions of H_<//>. This method is very simple and may be applied to films whose crystallographic axes in the film plane are unknown. With an adequate choice of the azimuth of the in-plane field, K_1 has been estimated with an accuracy of 30%.
社団法人応用物理学会の論文
1980-02-05