Features of the nonlinear dynamics of domain walls in ferrimagnets

The nonlinear motion of a 180 degrees domain wall with two inequivalent sub lattices in the field of a sound wave propagating orthogonally to the plane of the domain wall is investigated. The dependence of the drift velocity o f the domain wall on the polarization and the parameters of the sound wave is found. An analysis of the long-wavelength and short-wavelength approxima tions is carried out. The conditions for drift of the stripe domain structu re in ferrites are determined. (C) 2001 American Institute of Physics.