Superconducting Properties of the Singlet—Ground-State System(LaPr)Sn3

Abstract

The depressions of the superconducting transition temperature $T_c$ as a function of Pr concentration and the specific-heat jump $\Delta C$ at $T_c$ as a function of $T_c$ have been measured for the singlet-ground-state system $\left(La\mathrm{Pr}\right){\mathrm{Sn}}_3$. The results are well represented by numerical calculations based on the Pr energy-level scheme determined from separate measurement of the Schottky heat-capacity anomaly and the Van Vleck paramagnetic susceptibility contributed by the Pr ions.