Superconductivity ofα-Phase U-Mo Alloys at Zero and High Pressures

Heat-capacity measurements and determinations of the superconducting transition temperature as a function of applied pressure up to 10 kbar have been made on a number of $\alpha$-phase uranium-molybdenum alloys. Small additions of molybdenum rapidly change the superconducting properties of the $\alpha$ phase. The strong initial pressure dependence of $T_c$ for pure $\alpha$-U is destroyed, and bulk superconducting behavior at zero pressure develops.