Patent ID: 6671140
Filing Date: 2003-12-30
Classification: B82Y,G11B

Abstract:
A magnetic head comprising:a magnetic yoke film forming a closed magnetic circuit containing a magnetic gap; a first magnetic layer which is laminated on said magnetic yoke film and magnetically coupled to said magnetic yoke film; a second magnetic layer laminated on said first magnetic layer through a magnetic separation layer; and a pair of electrodes which are formed so that a laminate comprising said magnetic yoke film, said first magnetic layer, said magnetic separation layer and said second magnetic layer is sandwiched therebetween, wherein a bias magnetic field is applied to said first magnetic layer by a permanent magnet film disposed adjacent to said first magnetic layer in respect of the direction parallel to a surface of said first magnetic layer, and a magnetic signal in said magnetic yoke film is detected by using a magnetoresistance effect based on the difference between the magnetization direction of said first magnetic layer and the magnetization direction of said second magnetic layer.