Patent ID: 7292417
Filing Date: 2007-11-06
Classification: B82Y,G01R,G11B,H01F,H01L,Y10T

Abstract:
1. In a magnetic apparatus of the type having a perpendicular magnetic recording medium and a magnetic head arranged to perform reproduction from the perpendicular magnetic recording medium, the improvement wherein: said magnetic head includes a reproducing element, wherein said reproducing element has a magnetic-resistance element including a first non-magnetic metal layer, a second non-magnetic metal layer, and a magneto-resistance effect film formed between the first non-magnetic metal layer and the second non-magnetic metal layer, said magneto-resistance effect film includes a first ferromagnetic layer, a second ferromagnetic layer, and an intermediate insulating layer formed between the first ferromagnetic layer and the second ferromagnetic layer, and said magneto-resistance effect film is arranged so that a tunnel current flows between the first ferromagnetic layer and the second ferromagnetic layer through the intermediate insulating layer, wherein a magnetization direction of said second ferromagnetic layer is fixed by an anti-ferromagnetic layer which applies a bias magnetic field to the second ferromagnetic layer.