Single crystal growth and physical properties of a new uranium compound URhIn${}_5$

Abstract

We have grown the new uranium compound URhIn${}_5$ with the tetragonal HoCoGa${}_5$-type by the In self flux method. In contrast to the nonmagnetic ground state of the isoelectronic analogue URhGa${}_5$, URhIn${}_5$ is an antiferromagnet with antiferromagnetic transition temperature $T_{\mathrm{N}}$ = 98 K. The moderately large electronic specific heat coefficient $\gamma$ = 50 mJ/K${}^2$mol demonstrates the contribution of 5$f$ 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.

7 pages, 7 figures

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Cited by in corpus (1)

• Synthesis and properties of A${}_x$V${}_2$Al${}_{20}$ (A = Th, U, Np, Pu) ternary actinide aluminides