Patent ID: 6175475
Filing Date: 2001-01-16
Classification: B82Y,G01R,G11B

Abstract:
A spin valve (SV) magnetoresistive sensor, comprising:a first antiferromagnetic (AFM1) layer;a pinned layer adjacent to said AFM1 layer, said AFM1 layer pinning the magnetization of said pinned layer;a free layer of ferromagnetic material, wherein said free layer is the only free layer;a first spacer (spacer1) layer disposed between said free layer and said pinned layer;a keeper layer of ferromagnetic material;a second spacer (spacer2) layer of non-magnetic high electrical resistivity material disposed between said free layer and said keeper layer; anda second antiferromagnetic (AFM2) layer adjacent to said keeper layer, said AFM2 layer pinning the magnetization of said keeper layer.