Patent ID: 6338899
Filing Date: 2002-01-15
Classification: B82Y,G01R,G11B,H01F,Y10S,Y10T

Abstract:
A magnetoresistance effect element, comprising:a nonmagnetic spacer layer; first and second ferromagnetic layers separated by the nonmagnetic spacer layer, the first ferromagnetic layer having a magnetization direction at an angle relative to a magnetization direction of the second ferromagnetic layer at zero applied magnetic field, the second ferromagnetic layer comprising first and second ferromagnetic films antiferromagnetically coupled to one another and an antiferromagnetically coupling film located between and in contact with the first and second ferromagnetic films for coupling the first and second ferromagnetic films together antiferromagnetically so that their magnetizations are aligned and remain antiparallel with one another in the presence of a magnetic field signal, the magnetization of the first ferromagnetic layer being freely rotatable in response to the magnetic field signal; and a nonmagnetic high-conductivity layer disposed in contact with the first ferromagnetic layer so that the first ferromagnetic layer is disposed between the nonmagnetic spacer layer and the nonmagnetic high-conductivity layer, wherein the nonmagnetic high-conductivity layer and the second ferromagnetic layer have a film thickness so that wave asymmetry, (V1âˆ’V2)/(V1+V2), is in the range of negative 0.1 and positive 0.1, in which V1 is the peak value of reproduction output in a positive magnetic field signal and V2 is the peak value of reproduction output in a negative magnetic field signal.