Easy Magnetization Axis of LPE Garnet Films Grown on Misoriented (111) GGG Substrates

Abstract

It has been observed that the inclination angle of the easy magnetization axis is larger than that of the [111] axis in LPE bubble garnet films grown on GGG substrates slightly inclined from the (111) plane. This phenomenon was investigated in the light of Gyorgy’s 2-parameter model. The relationship between the inclination of the easy magnetization axis and that of the [111] axis was explained by employing −1.8 and −0.9 as the 2-parameter ratios, A⁄B, for (Y, Eu)₃(Fe, Ga)₅O₁₂ and (Er, Eu)₃(Fe, Ga)₅O₁₂ garnet films, respectively.
The result suggests that the substrate surfaces of these garnets should be made up at least within ±0.25° and ±1.1° in reference to the (111) plane, depending on the magnitude of A⁄B for actual device works.