DESIGN OF HIGH-DENSITY DUAL STRIPE MR HEADS USING A THERMAL TRANSMISSION-LINE MODEL

A thermal transmission line model is described and used to study the p erformance of high track density dual stripe magnetoresistive (DSMR) r ecording heads. The model was calibrated to actual thermal and signal amplitude data by adjusting sensor material properties. Signal sensiti vity per unit track width from the preamp are shown to improve by decr easing the sensor thickness. Further improvement with track density is predicted for smaller aspect ratios. For a square active region (aspe ct ratio = 1.0) no degradation in signal sensitivity was seen up to ap proximately 19 ktpi.