MAGNETO-OPTICAL CHARACTERISTICS OF BAM FERRITE/CO-OXIDE MULTILAYERED FILMS

Multilayers composed of 25 bilayers of magnetoplumbite type of barium ferrite(BaM) layers as thin as 120 Angstrom and CoO or Co3O4 layers on ZnO/SiO2/Si substrates were prepared by vacuum-arc evaporation. X-ray diffraction indicated these multilayers possessed clear periodic structure with sharp and flat interfaces. Mossbauer spectroscopy indicated strong magnetic interactions among the iron and cobalt ions through the interfaces. The apparent orientation of magnetic spins in the BaM/CoO multilayer was parallel to the layer planes. Multilayer exhibited a magnetic spin orientation which was oblique to the layer planes, a coercivity H-c of 2.0 kOe and Kerr rotation angle theta(K) of 10 min.