The track-edge bias profile in shunt-biased magnetoresistive heads

We present a micromagnetic calculation of the variation in bias angle near the track edge in shunt-biased magnetoresistive heads. This track-edge bias profile shapes the head response at the track edge and hence determines the minimum track spacing based on considerations of adjacent track crosstalk. Our results show that the width of the bias profile at track edge can be substantial and that conditions for minimizing it conflict with those which maximize signal amplitude.