Patent ID: 6570744
Filing Date: 2003-05-27
Classification: B82Y,G01R,G11B,H01F

Abstract:
A magnetoresistance effect film formed on a substrate, comprising:a plurality of magnetic thin films; a non-magnetic thin film interposed between said magnetic thin films arranged adjacent thereto; and an antiferromagnetic thin film arranged adjacent to one of a pair of said magnetic thin films disposed via the non-magnetic thin film, said antiferromagnetic thin film generating an exchange bias field of Hr, the other of said pair of magnetic thin films having a coercive force of Hc2 lower than Hr, wherein said magnetoresistance effect film comprises a ground layer formed on said substrate, said ground layer being made of material selected from the group consisting of Zrâ€”Hf, Zrâ€”Au and Zrâ€”Co, said antiferromagnetic thin film being laminated adjacent to and in contact with said ground layer, and said antiferromagnetic thin film comprises PtMn or PdMn, said antiferromagnetic thin film having a surface with an average roughness of 1-5 Ã¥.