Patent ID: 6607641
Filing Date: 2003-08-19
Classification: B82Y,G01R,G11B,H01F

Abstract:
A method of producing an exchange coupling film comprising:forming a first antiferromagnetic layer which contacts a ferromagnetic layer at an interface therebetween, and forming a second antiferromagnetic layer which contacts the first antiferromagnetic layer, the first and second antiferromagnetic layers comprising an element X and Mn, wherein the element X is selected from the group consisting of Pt, Pd, Ir, Rh, Ru, Os, and combinations thereof, such that a composition ratio of the element X of the second antiferromagnetic layer is smaller than a composition ratio of the element X of the first antiferromagnetic layer; and effecting a heat-treatment such that an exchange coupling magnetic field is developed at the interface between the first antiferromagnetic layer and the ferromagnetic layer.