Abstract
We calculate the critical magnetic field of thin films of superconducting material coated with normal metal. The proximity effect is taken into account in a brief discussion in the body of this paper. In particular, we consider the normal-metal coating to range from very thin to very thick and to have a critical temperature ranging from [Formula: see text] to [Formula: see text], where Tc is the critical temperature of the superconductor. For material with sufficient dosing in paramagnetic impurities, [Formula: see text]. We obtain eigenvalue equations involving confluent hypergeometric functions for the critical field of a given film thickness for all possible normal-metal coatings.
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