Anisotropy of Magnetic and Transport Properties οf UAuSb2 Single Crystals |
| R. Troć, Z. Bukowski, J. Stępień-Damm, and C. Sułkowski
Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, 50-950 Wrocław 2, Poland |
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| The uranium-gold diantimonide UAuSb2 belongs to a numerous family of ternary compounds crystallizing in a tetragonal structure of the HfCuSi2-type (space group P4/nmm). In this paper the results of magnetization, electrical resistivity and thermopower measured along the main crystallographic directions are reported. Two magnetic transitions, a ferromagnetic one at TC =31 K and probably an antiferromagnetic one at TN = 43 K were found. The spontaneous magnetization at 1.9 K amounts about 0.8 μB for B∥ c-axis. Electrical resistivity for j⊥ c-axis exhibits a T2 exp(-Δp/kT) dependence at low temperatures and a Kondo effect at higher temperatures above TN. The thermopower S for both main crystallographic directions shows a maximum at the temperature close to TC and the lack of any anomaly at TN. |
| DOI: 10.12693/APhysPolA.115.181 PACS numbers: 71.20.Lp, 71.27.+a, 75.30.Gw |