The Electronic and Lattice Specific Heats in W, Mo, and Re

Abstract

Calorimetric measurements have been made in the temperature range 1°K to 77°K on W, Mo, and Re. At the lowest temperatures for W and Mo the specific heat could be resolved into a lattice $T^3$ function together with an electric term, $\gamma T$. It was found that at the lowest temperatures (a), for W, $\theta =250\mathrm{}°\mathrm{K}\mathrm{to} 380°\mathrm{K}$ and $\gamma =(1.8\mathrm{}\pm 0.7)\times {10}^{-4\mathrm{}}$ cal/mole-${\mathrm{deg}}^2$ (b), for Mo, $\theta =445\mathrm{}°$K and $\gamma =(5.1\mathrm{}\pm 0.4)\times {10}^{-4\mathrm{}}$ cal/mole-${\mathrm{deg}}^2$. These new measurements on tungsten indicate the need for revising previously quoted data.