Crystal Structure and Physical Properties of U3T3Sn4 (T = Ni, Cu) Single-Crystals

Physics – Condensed Matter – Strongly Correlated Electrons

Scientific paper

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12 pages (incl. 2 tables & 4 figures), to appear in Physica B

Scientific paper

10.1016/S0921-4526(00)00460-9

Heat capacity experiments, crystal structure determination and transmission electron microscopy have been carried out on U3Cu3Sn4 single-crystals. U3Cu3Sn4 was confirmed to be a heavy-fermion antiferromagnet (TN=13(1) K) with a low temperature electronic heat capacity coefficient gamma=390 mJ/molUK2. Low temperature heat capacity experiments on a U3Ni3Sn4 single-crystal indicate that below 0.4 K there is a crossover between the previously observed non-Fermi liquid behavior and a Fermi liquid state.

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