High frequency magnetization reversal in rotating fields

Micromagnetic simulations of polycrystalline thin films predict that rotational magnetization processes are much more strongly affected by interactions and much less strongly affected by damping than 1-D switching processes. Interactions significantly affect the rotational hysteresis loss and reduce the magnitude of the field required for reversal. Reversal in rotating fields is predicted to occur at frequencies up to an order of magnitude higher than in 1-D switching fields. Track edge erasure in longitudinal recording is therefore predicted to persist to higher frequencies than the recorded signal, and we suggest that perpendicular recording may be possible at higher frequencies and with higher anisotropy materials than longitudinal recording.