MAGNETIC-ANISOTROPY INVESTIGATION IN (210)-ORIENTED BISUBSTITUTED MAGNETIC GARNETS

Different methods of describing growth- and stress-induced anisotropy are analysed. Two-parameter and quadratic models (generally five param eters) are discussed. A (2 1 0)-oriented epitaxial garnet film was cho sen as an example of this analysis. Magnetic anisotropy constants were analyzed using both the traditional FMR technique and a magneto-optic al anisometer based on the Faraday effect. The two-parameter model tur ned out to be incorrect for anisotropy description in such films. Obse rved differences between the experimental values of anisotropy constan ts from FMR and magneto-optical methods may be connected to magnetostr iction influence on the resonance frequency.