Nonlinear surface magnetostatic waves

A theory is derived for the propagation of intense surface magnetostatic waves in thin ferromagnetic films. At certain angles between the wave propagation direction and the external magnetic field, these waves become unstable with respect to the formation of longitudinal solitons (envelope solitons). The regions in which they exist are found. These nonlinear waves exhibit bistable properties during propagation in ferromagnetic films with periodic structures. The threshold power level for the occurrence of this instability is determined. The properties of nonlinear magnetostatic Love waves in a structure consisting of a ferromagnetic film and a nonmagnetic half-space are analyzed