Rigid band behavior of platinum-vanadium alloys: low-temperature specific heat

Abstract

Measurements are reported of the specific heat of a number of PtV alloys. The results can be analyzed by using a simple rigid band model. The band shape of platinum is deduced and the number of holes in the platinum d band is estimated to be 0.35, which agrees very well with other determinations. Deviations from the simple rigid band behavior were observed for higher vanadium concentrations and are believed to be caused by interactions between impurity atoms. Using the critical concentration of 6 at %V for interactions to start, the interaction range is estimated.