THE ANISOTROPY OF THE PENETRATION DEPTH IN S N MULTILAYERS/

The structure of the vortex and the anisotropy of the penetration dept h, lambda, in a superlattice compound of nonequivalent superconducting layers (S(i)) and isolating layers (I(i)) has been studied theoretica lly. Our particular interest concerned the case when one of the layers is a normal metal (N) whose superconducting properties are induced vi a the proximity effect with S-layers. It was shown that the anisotropy , alpha = lambda(parallel-to)lambda(perpendicular-to), for S/N multila yers is temperature dependent and may either increase or decrease with decreasing temperature.