CHAOTIC DYNAMICS OF PERIODICALLY DRIVEN DOMAIN-WALLS IN MAGNETIC GARNET-FILMS

Nonlinear dynamics was investigated theoretically for the magnetic dom ain wall in a bubble garnet film for the case of the periodic drive fi eld. Analysis of the phase trajectories, the Poincare sections and the spatio-temporal diagrams was performed. Pattern entropies, power spec tral densities and correlation functions were analyzed. As a result, i t was found that, depending on the period and amplitude of the drive f ield, a motion of the wall is periodic, quasi-periodic or chaotic. Ver y peculiar behaviour of the spatial correlation was found for the quas i-periodic and chaotic states. (C) 1998 Elsevier Science Ltd. All righ ts reserved.