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Superconductivity is observed in an epitaxial metal film sandwich of Ag-Pd-Ag, with Tc=2.15 K, initially. Room-temperature storage caused Tc to drop to 1.00 K after 180 days, and the Tc decrease was accompanied by development of a resistivity minimum. The large orbital contribution to H_c² 70 kOe/K, is comparable to those found in high H_c² Chevrel-phase materials.
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M. B. Brodsky (1982) studied this question.
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