Electrical Resistivity ofAu3Cu at Low Temperatures

Abstract

The electrical resistivity of ${\mathrm{Au}}_3$Cu heat-treated for different lengths of time at 185°C was measured from liquid helium temperature to room temperature. Although this alloy is anomalous in that the ordered state has a higher electrical resistivity than the disordered one, it was found that the annealed state has actually a lower resistivity than the quenched one at liquid helium temperature. The Debye temperature of the ordered state is found to be lower than that of the disordered state and this fact is contrary to the case of ${\mathrm{Cu}}_3$Au.