Electrical Resistivity and Hall Effect of Noble Metals at Very Low Temperatures

DOI 機関リポジトリ 機関リポジトリ (HANDLE)

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説明

The electrical resistivity and the Hall effect of gold, silver and copper were measured at low temperatures. The Hall effect of gold which showed the minimum at 6°K in the resistivity-temperature curve was found to be dependent on temperature below 6°K. Since the electron mobility deduced from the resistivity and the Hall coefficient was nearly constant at temperatures below 6°K, it was suggested that the origin of the resistance minimum might be ascribed to the change in the concentration of current carrier. On the other hand, the silver and copper specimens showed the normal behaviour of electrical resistivity and the temperature-independent Hall effect. In general, the Hall coefficients of these noble metals were found to be constant at low temperatures, the values being about 20 per cent larger than those at room temperatures, which fact indicates that the Hall effect is temperature-dependent at intermediate temperatures (20～300°K).

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