Single crystal growth and study the physical properties of non-centrosymmetric UIrSi$_{3}$

Heavy-fermion superconductivity in the non-centrosymmetric crystal structure has drawn much attention [1]. It is theoretically argued that the order parameter contains not only a spin-singlet part, but also an admixture of a spin-triplet state. The compound UIrSi$_{3}$ crystallizes in the non-centrosymmetric BaNiSn$_{3}$ structure which is closely related to the well-known ThCr$_{2}$Si$_{2}$-type [2]. Preliminary study on polycrystalline UIrSi$_{3}$ shows antiferromagnetic order below Neel temperature $T_{\mathrm{N}}=$42 K [2]. Its lanthanide analog CeIrSi$_{3}$ shows heavy-fermion superconductivity under pressure [1]. Therefore, further investigation on UIrSi$_{3}$ would be meaningful. We will present our attempt to grow single crystal of UIrSi$_{3}$ by Czochralski method in a tetra-arc-furnace and study of its physical properties. \\[4pt] [1] Onuki \textit{et al}., J. Phys. Soc. Jpn. \textbf{77}, suppl. A 37 (2008).\\[0pt] [2] Buffat \textit{et al.}, J. Mag. Mag. Mat. 62, 53 (1986).