Single crystal study on UNi0.5Sb2 |
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Affiliation: | Institute for Low temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, 50-950, Wroc aw, Poland |
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Abstract: | Single crystals of UNi1−xSb2 have been grown from an Sb-rich melt and studied by means of X-ray diffraction, magnetic and electrical transport measurements. Crystal structure refinements indicated significant deficiency on the transition metal sites in the tetragonal HfCuSi2-type unit cell, yielding the actual composition UNi0.5Sb2. The single crystals studied order antiferromagnetically below TN=161 K and exhibit another phase transition at Tt=60 K, presumably caused by a spin-reorientation. No crystal structure distortion could be detected at 10 K. Above TN the electrical resistivity is dominated by a Kondo effect, whereas at lower temperatures it shows a behavior characteristic of antiferromagnets. The overall magnetic and electrical transport properties of UNi0.5Sb2 are highly anisotropic both in the ordered and paramagnetic states. |
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Keywords: | A. Magnetic intermetallics B. Magnetic properties B. Electrical resistance and other electrical properties B. Crystallography C. Single-crystal growth |
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