Patent ID: 6462918
Filing Date: 2002-10-08
Classification: B82Y,G11B

Abstract:
A magnetoresistance effect type head havinga magnetoresistance effect element which is changed in resistance corresponding to the intensity of an external magnetic field, and detecting the intensity of a magnetic field by detecting the magnitude of the resistance of the magnetoresistance effect element, comprising: the magnetoresistance effect element comprising a multilayer film including a free magnetic layer which is changed in the direction of magnetization corresponding to an external magnetic field, wherein the free magnetic layer is provided with an overhang portion which is overhung and spread from a layer excluding the free magnetic layer and constituting the multilayer film, and paired magnetic wall control layers which are in contact with the upper and under surfaces of the overhang portion of the free magnetic layer respectively and restrict the movement of the magnetic wall of the overhang portion.