Low-Temperature Specific Heat of Body-Centered Cubic Ti-V Alloys

Abstract

The electronic specific heat coefficient, $\gamma$, of V and of bcc Ti-V alloys was measured. A maximum of $\gamma$ occurs at approximately 60 at.% V. The electronic specific heat coefficients were found to correlate quite well with the superconductive transition temperatures according to the Bardeen-Cooper-Schrieffer theory, with an interaction coefficient $V$ independent of composition. From the exponential dependence of the electronic specific heat in the superconductive state on the reciprocal temperature, an energy gap of 0.0014 to 0.0025 ev was calculated, depending on the composition.