[Show abstract][Hide abstract] ABSTRACT: Self-localized domain wall (DW) oscillations in a uniaxial ferromagnet in the presence of dissipation and a periodic homogeneous magnetic field are under investigation. On the basis of perturbation theory and the direct numerical solution of magnetodynamic equations, the stabilization conditions of soliton-like domain wall oscillations have been found. For a given frequency of pumping field, the narrow range of field magnitude, where the effects of self-organization on the domain wall appear, has been discovered. The threshold of the external field amplitude, when the generation of Bloch lines in the domain wall starts, has been obtained approximately. Such generation is the initial stage of chaotization of the domain wall under the parametric pump, which has been observed in the numerical experiments.
[Show abstract][Hide abstract] ABSTRACT: Possibility of using magnetostatic wave scattering by a surface acoustic
wave for transformation of impulse signal time scale is considered.
Processes of parametric transformation of magnetostatic waves by a
modulated surface acoustic wave in linear regime are studied. Influence
of the acoustic pumping and the pulse duration on evolution the signal
and the transformed impulse shapes as well as influence of dissipation
on impulse scattering processes are analyzed.
[Show abstract][Hide abstract] ABSTRACT: Numerical solution of the Landau-Lifshitz equation system combined with analytical methods of asymptotic analysis of solutions in the vicinity of the system equilibrium state was applied for determining the range of stability to longitudinal disturbances of a basic state on the quality factor - external magnetic field surface. Dynamics of nonequilibrous initial shape of domains was presented with the help of direct numerical solution of the equations mentioned. Critical magnetic field for remagnetization nucleus collapse was found to decrease with quality factor Q increase. Calculated results agree well with the data earlier obtained by variational techniques, especially for Q>2.4.