Inhomogeneous oscillations of domain boundaries in single crystal ferrite samples

Spatially in homogeneous collective oscillations of domain boundaries are examined in a magnetostatic approximation for the case of a singlecrystal magnetic dielectric sample with plastic two - phase domain structure. It is proposed that the spatial period of the oscillations is somewhat greater than the domain width, and that the displacements of all the boundaries are related by means of the demagnetizing field. A dispersion relation is obtained for plane waves of the boundary displacements. The spectrum of inhomogeneous oscillations of boundaries analogous to the Walker modes in the saturation region is computed for the case of a spherical sample.