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Measurements have been made of the resistive properties of a series of SNS sandwiches of In/W/In containing 0-10% Pb in In. The low-temperature interface resistance attributable to the alloying of the superconductor varied linearly with the resistivity of the InPb alloy, as predicted by Harding, Pippard and Tomlinson (1974). The magnitude of this resistance was, however, found to be a factor of five less than predicted. The theory has been modified at higher temperatures, and agreement between theory and experiment for the form of R SNS (T) in dirty sandwiches has been obtained for the first time.
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Lean et al. (1989) studied this question.
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