Abstract
Co-Nb/Pd multilayers were prepared by a radio-frequency sputtering method. As the thickness of Pd layers increases, the phases of Co-Nb layers periodically alternate from an amorphous state to a crystalline state. The oscillation of the strain of Pd layers and that of the coherent length versus the thickness of Pd layers with a period of about 10 Å are obtained. The strain is caused mainly by the degree of lattice mismatching of Co-Nb layers and Pd layers, but the oscillatory behavior of the strain may be related to the oscillatory interlayer coupling between Co-Nb layers through Pd layers. The oscillation of the saturation magnetization is also obtained. It corresponds to the oscillatory polarization of Pd layers and the structural change in Co-Nb/Pd multilayers.
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