Single-crystal growth and physical properties of URhIn₅

We have grown the uranium compound URhIn₅ with the tetragonal HoCoGa₅-type by the In self-flux method. In contrast to the nonmagnetic ground state of the isoelectronic analog URhGa₅, URhIn₅ is an antiferromagnet with antiferromagnetic transition temperature T_N=98 K. The moderately large electronic specific heat coefficient γ=50 mJ/K2mol demonstrates the contribution of 5f electrons to the conduction band. On the other hand, magnetic susceptibility in the paramagnetic state roughly follows a Curie-Weiss law with a paramagnetic effective moment corresponding to a localized uranium ion. The crossover from localized to itinerant character at low temperature may occur around the characteristic temperature 150 K where the magnetic susceptibility and electrical resistivity show a marked anomaly.