Half-Heusler compounds UPtSn and ThPtSn: Sn119 and Pt195 NMR studies

Intrinsic magnetic susceptibilities of ThPtSn and UPtSn have been determined from the analysis of magnetisation isotherms recorded in the temperature range 1.9–300 K, and in magnetic field strengths up to 5 T. ThPtSn is found to be diamagnetic. Susceptibility data of UPtSn exhibit a cusp-like behaviour in the vicinity of 35 K and Curie–Weiss law above 150 K. Microscopic properties of UPtSn have been studied by Sn119 and Pt195 NMR Knight shift, K  , and the spin–lattice relaxation rate 1/T11/T1 in the paramagnetic state (35K