Patent ID: 7859797

Claim:
A magnetic head comprising: a substrate; a lower shield formed above said substrate; a magnetoresistive film formed above said lower shield, said magnetoresistive film including: pinned layers; a non-magnetic layer; and free layers; and an upper shield formed above said magnetoresistive film, current flowing between said lower shield and said upper shield, wherein said lower shield has a stacked structure comprising a first lower shield formed on a side thereof, adjacent to said substrate, a crystalline reset layer, and a second lower shield formed on a side thereof, adjacent to said magnetoresistive film, said crystalline reset layer comprising an amorphous layer, wherein said amorphous layer is composed of an AlZr alloy, or one element selected from the group consisting of Hf or Zr, or an alloy containing the Hf or Zr as the main constituent thereof.