Superconductivity of Rhenium

Measurements have been made in the liquid helium temperature region of the magnetic threshold curve of rhenium by observations of the magnetic moment of a powdered sample. The transition temperature $T_c$ in zero magnetic field was found to be 2.42°K, and the observed slope of the threshold curve at $T=T_c$ was 235 gauss per degree. Assuming a reversible transition, the value of the normal electronic specific heat coefficient $\gamma$ obtained from the magnetic data is 4.6×${101}^{-4\mathrm{}}$ calories per mole per ${\mathrm{degree}}^2$, a value which would be expected from the correlation between $\frac{\gamma }{V}$ and $T_c$ previously proposed.