Influence of the domain structure of the magnetostatic-oscillation spectrum of a ferrite plate

The resonant frequencies of long-wave magnetostatic oscillations are calculated theoretically for a plate of a cubic magnet $(K_1<0)$ with a two-phase domain structure in the case of magnetization along the axis [110]. In the range 0.4-1.85 GHz, the spectrum of a YIG plate was investigated experimentally. Good agreement of theory and experiment is obtained both in the saturation region and in the field range where there is two-phase plate domain structure.