COUPLING BETWEEN 2 FERROMAGNETIC-FILMS THROUGH A NONMAGNETIC METALLIC LAYER

Coupling between two transition-metal ferromagnetic films separated by a layer of a simple metal is analysed within a spin-polarized free-electron approximation for the conduction electrons in both ferromagnetic films. The corresponding coupling parameters J oscillates with the spacer thickness. It also varies oscillatory-like with the thickness of ferromagnetic films. The amplitude of the oscillations strongly depends on the magnetic polarization of the conduction electrons in the ferromagnetic films.