Modeling ferrite electromagnetic response in the time-domain

It is shown that the Landau-Lifshitz-Gilbert equation can be used in conjunction with Maxwell's equations to model the magnetization reversal process in those situations in which the nonmagnetic interactions in the material are negligible. It is seen that the resulting behavior, called uniform rotation, is characterized by intermediate magnetization states for which Delta *M approximately=0, and may be described as a procession of the magnetization vector about the small demagnetizing field that is induced during the switch. The work presented is part of a broader attempt to simulate the magnetization reversal process in induction linacs. The results of a numerical simulation of the flux reversal process in an infinite cylinder with idealized boundary conditions are presented.<>