High frequency magnetization reversal in rotating fields

Micromagnetic simulations of polycrystalline thin films predict that rotati onal magnetization processes are much more strongly affected by interaction s and much less strongly affected by damping than I-D switching processes. Interactions significantly affect the rotational hysteresis loss and reduce the magnitude of the field required for reversal. Reversal in rotating fie lds is predicted to occur at frequencies up to an order of magnitude higher than in I-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 high er frequencies and with higher anisotropy materials than longitudinal recor ding.