The application of rotational switching model to a cylindrical magnetic film and continuous planar film

A numerical method is presented to extend the coherent rotation model to the study of the dynamic switching behavior of continuous magnetic films for a nonuniformly distributed applied field. This field seriously affects the switching behavior of the film. Infinite planar films and cylindrical films with an applied magnetic field produced by a hairpin word strap are used as examples. The induced voltage from magnetic films is found to be very sensitive to the wave shape of the applied magnetic field as well as to the rise time and amplitude of the field. The calculations also include the bandwidth-limited sense system, which attenuates and distorts the induced voltage. A comparison with an experimental voltage from a cylindrical film was made. Also, the magnetostatic field distributions along the hard direction are determined for the static condition when torques on the magnetization approach zero.