Patent ID: 6181535
Filing Date: 2001-01-30
Classification: B82Y,G01R,G11B,Y10T

Abstract:
A magnetoresistance effect head comprising a magnetoresistance effect film, conductive films and a gap portion,wherein said conductive films are conductively connected to said magnetoresistance effect film,wherein said magnetoresistance effect film is a spin valve multilayered film which comprises a non-magnetic metal layer, a ferromagnetic layer formed on one surface of the non-magnetic metal layer, a soft magnetic layer formed on the other surface of said non-magnetic metal layer, and an antiferromagnetic layer which is formed on a surface of said ferromagnetic layer remote from a surface thereof abutting said non-magnetic metal layer so as to pin a direction of magnetization of said ferromagnetic layer,wherein said antiferromagnetic layer pins the direction of magnetization of said ferromagnetic layer,wherein the pinned magnetization direction of said ferromagnetic layer is forcibly controlled by a pulse magnetic field process so as to be substantially orthogonalized relative to a magnetization direction of said soft magnetic layer at the time of an external magnetic field being zero, said pulse magnetic field process intermittently applying a pulse magnetic field of a pulse magnetic field intensity I being 5 kOe to 40 kOe to said magnetoresistance effect film, andwherein the pinned magnetization direction of said ferromagnetic layer is in an angle range of 90.+-.10 degrees relative to the magnetization direction of said soft magnetic layer at the time of the external magnetic field being zero.