Coexistence of antiferromagnetic and spin-glass behaviour in U3Rh3Sb4

We report on single-crystal growth, crystal structural determination and magnetic, electrical resistivity and thermoelectric power measurements performed on a set of single crystals of U3Rh3Sb4. The compound crystallizes in the cubic Y3Au3Sb4-type structure. The ac susceptibility and dc magnetization both indicate that the compound undergoes a transition into a spin-glass state below 14.7 K. The resistivity shows a broad minimum at 30 K. The thermoelectric power is negative in the whole temperature range studied and exhibits an enhanced value of -32 μV K-1 at room temperature