Lorenz Number of Pure Palladium at Low Temperatures

The ideal electrical and thermal resistivities of pure Pd have been measured at temperatures from 2.5 to 19°K. The results yield an ideal Lorenz number ($L_i$) which has the value of 0.7×${10}^{-8\mathrm{}}$ ${\mathrm{V}}^2$/${\mathrm{deg}}^2$ and is independent of temperature below roughly 5°K. A comparison of these results with data on Re and Ni indicates that the low-temperature values of $L_i$ are parameters which are characteristic of the individual metals.