Magnetostatic waves in a ferrite plate with domain structure

The paper discusses the spectrum and major parameters of the magnetostatic waves MSW in a $(1\bar{1}0)$ plate of cubic ferrite ($K_1<0$) having a domain structure DS when the waves have a length greatly exceeding the DS period. A dispersion equation is derived, and results are given from the numerical calculation of the frequencies and group velocities for the case of YIG parameters. The spectrum consists of transverse MSW that are analogs of Damon-Eshbach modes and longitudinal MSW due to the resonant component $\mu_z$ of the magnetic-permeability tensor averaged over the DS. The first may be surface and bulk direct waves or bulk reverse ones. The longitudinal MSW are only direct waves, both surface and bulk types. It is shown that the wave type can be transformed from surface to direct bulk and from direct bulk MSW to reverse.