Patent ID: 6456468
Filing Date: 2002-09-24
Classification: B82Y,G01R,G11B,H01F,Y10T

Abstract:
A magnetic information recording and playback system, comprising:(a) a magnetoresistance effect element for detecting a magnetic field, wherein the magnetoresistance effect element comprises an anti-ferromagnetic layer, a fixed magnetic layer, a non-magnetic layer and a free magnetic layer laminated successively onto a base layer, said anti-ferromagnetic layer is a single layer film or multiple layer film comprising Ni oxide, Co oxide or Fe oxide as a principal component, or a mixture of these, and an adhesive layer for preventing peeling due to heat generated by the flow of current is provided between the base layer and the anti-ferromagnetic layer; (b) electrodes for supplying a sensor current to said magnetoresistance effect element; and (c) a resistance detector for detecting the change in resistivity of said magnetoresistance effect element as a function of the detected magnetic field.