Abstract
Single crystals of uranium intermetallic compound UCo 0.5 Sb 2 were grown by means of the antimony-flux technique. The characterization of the samples has been carried out utilizing single crystal X-ray diffraction and magnetization measurements. UCo 0.5 Sb 2 is found to crystallize in the tetragonal HfCuSi 2 -type structure, space group P 4 / nmm with Z = 2 formula units per cell, and the lattice parameters a = 0.4300 ( 1 ) and c = 0.8958 ( 2 ) nm . The refinement of the occupancy parameters and the energy dispersive X-ray analysis have indicated a distinct deficiency on the cobalt sites. The results of magnetization measurements showed that UCo 0.5 Sb 2 orders ferromagnetically below 65 K with a huge magnetocrystalline anisotropy with the c direction being the easy magnetization axis.
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