Abstract
Nonlinear oscillations of domain walls in a ferromagnetic film with a plane-parallel periodic domain structure have been studied analytically and numerically in an external field with slowly changing amplitude and frequency. The conditions for the controlled autoresonance excitation of nonlinear oscillations of a domain wall in the presence of dissipation have been determined. The threshold values of the amplitude and rate of amplitude growth of the field of pumping have been found depending on the geometrical characteristics of the domain structure of the films whose exceeding generates an effect of autophasing in the system. It is shown that the magnetic saturation of a ferromagnetic film in the autoresonance regime can occur in fields that are substantially less than the fields of dynamic stationary magnetization.
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