Abstract
The nonlinear coherent interaction of a high-frequency acoustic wave pulse with a magnetically ordered medium is studied theoretically. We consider both microscopic and phenomenological theories of the formation of nonlinear magneto-acoustic waves in a ferromagnet. A self-consistent determination of the dispersion law for nonlinear magneto-acoustic waves in a ferromagnet is carried out. It is shown that in both of these theories nonlinear excitations arise which can be of the form of a periodic nonlinear wave, a soliton, or a kink. The nature of the change of polarization of transverse linearly polarized magneto-acoustic waves is also investigated.
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