It is shown that the thermoelectric power of Ni as a function of temperature exhibits a minimum followed by a maximum in the same temperature interval in which a deviation from the logarithmic temperature dependence of the $\alpha \mathrm{}\left(T\right)=\frac{d\rho \mathrm{}\left(T\right)\mathrm{}}{\mathrm{dT}}$ curve was observed. In other samples of the same purity the $\alpha \mathrm{}\left(T\right)\mathrm{}$ curve did not show any deviation from the logarithmic temperature dependence and the thermoelectric power is a monotonic function of the temperature.

• Received 2 February 1970

DOI:https://doi.org/10.1103/PhysRevLett.24.894