Self-pinned CPP giant magnetoresistive head

摘要

A CPP giant magnetoresistive head (1) includes lower (10) and upper (50) shield layers, and a giant magnetoresistive (30) element disposed between the upper and lower shield layers and including a pinned magnetic layer (31), a free magnetic layer (33) and a nonmagnetic layer (32) disposed between the pinned magnetic layer and the free magnetic layer. In the CPP giant magnetoresistive head, the pinned magnetic layer extends to the rear of the nonmagnetic layer and the free magnetic layer in the height direction, and the dimension of the pinned magnetic layer in the height direction is larger than that in the track width direction. Also, the pinned magnetic layer comprises a magnetic material having a positive magnetostriction constant or a magnetic material having high coercive force, and the end of the pinned magnetic layer is exposed at a surface facing a recording medium.