Patent ID: 6545848
Filing Date: 2003-04-08
Classification: B82Y,G01R,G11B

Abstract:
A magnetic transducer comprising:a magneto-sensitive layer detecting an external magnetic field; and a magnetic domain control film applying a longitudinal bias magnetic field to the magneto-sensitive layer, the magneto-sensitive layer further comprising: a magneto-separative layer; a soft magnetic layer formed on one side of the magneto-separative layer, the orientation of magnetization of the soft magnetic layer being freely changed by an external magnetic field; a ferromagnetic layer formed on the other side of the magneto-separative layer; and an antiferromagnetic layer formed on the ferromagnetic layer on the side opposite to the magneto-separative layer, and the magnetic domain control film further comprising: a magnetic domain control ferromagnetic film made of a ferromagnetic material; and a magnetic domain control magnetization fix film for fixing the orientation of the magnetization of the magnetic domain control ferromagnetic film, wherein a magnetostriction &lgr;s of the magnetic domain control ferromagnetic film is within a range of âˆ’15Ã—15Ã—10âˆ’6