Magnetic sensor with differing stripe heights

摘要

A magnetic sensor may be generally configured in accordance with various embodiments to have a magnetically responsive stack with first and second free layers and without a fixed magnetization. The first and second free layers can be tuned to have different stripe heights from an air bearing surface (ABS) and square rear surface features distal the ABS.

主权项

1. A data sensor comprising a magnetically responsive stack comprising first and second free layers and without a fixed magnetization, the first free layer having a lesser stripe height from an air bearing surface (ABS) than the second free layer, the first and second free layers each having square rear surface features distal the ABS, a bias magnet separated from the magnetically responsive stack and aligned with the second free layer so that no portion of the bias magnet extends beyond the centerline.