THERMAL-PROPERTIES OF UPDSN AND UCUSN

We report on the specific heat and the thermopower of UPdSn and UCuSn, both of which order antiferromagnetically at low temperatures. The co mpounds show similar behaviour in the specific heat, and the large mag netic-entropy changes around T-N are evidence for a large degree of 5f -electron localization. For both compounds, we find that thermopower r esults are consistent with the findings for the electrical resistance. While for UCuSn very abrupt changes at 25 and 60 K are observed for b oth quantities, more continuous changes at the magnetic transitions (2 5 and 40 K) are found for UPdSn.