Abstract
The thermal transport properties of silver and silver-base alloys at low temperatures have been studied, the former being reported in this paper. The high purity of the silver metal gives rise to a relatively large reduction of the thermal conductivity due to electron-phonon interaction even in the temperature range of liquid helium. The temperature dependence of the resistance, caused by this mechanism is analyzed. Deviations from Matthiessen's rule for the thermal resistance appear to be substantially larger than expected from theoretical considerations. The temperature dependence of the thermopower cannot readily be explained, a strong dependence on specimen purity is observed. Cold-working is believed to give an observable reduction of the phonon drag contribution S g to the thermopower. The diffusion-thermopower S e of dislocations in silver is positive, in agreement with observations at high temperatures.
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