Anomalous Heat Flow in Superconductors

Measurements of heat flow in the superconductive and in the normal state have been carried out on pure lead and lead containing a small quantity of bismuth. The heat conduction has been measured in its dependence on magnetic field and temperature. The alloy shows a smaller heat conduction in the intermediate state than in either the superconductive or the normal state. This anomalous behavior is taken to indicate the existence in superconductors of a type of heat transport similar to that observed in liquid HeII.

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