Patent ID: 7218487
Filing Date: 2007-05-15
Classification: B82Y,G11B,H01F,Y10T

Abstract:
1. An exchange coupling film comprising an antiferromagnetic film and a ferromagnetic film in contact with the antiferromagnetic layer, an exchange coupling magnetic field generated at the interface between the antiferromagnetic layer and the ferromagnetic layer magnetizing the ferromagnetic layer in a particular direction, wherein diffraction spots corresponding to reciprocal lattice points indicative of crystal planes of the antiferromagnetic layer and the ferromagnetic layer appear in transmission electron beam diffraction diagrams of the antiferromagnetic layer and the ferromagnetic layer obtained using an electron beam in a direction perpendicular to the interface, and wherein, among said diffraction spots, a diffraction spot given a particular label appears only in one of the diffraction diagrams of the antiferromagnetic layer and the ferromagnetic layer.