We report on the properties of single crystals of Pr_0.5Ir₄Sb_10.2Sn_1.8, a new partially-filled rare earth skutterudite which exhibits Kondo alloy and heavy fermion behavior. Using magnetic susceptibility, specific heat, and resistivity measurements we find evidence of Kondo-screening of the f-moments. This material shows a Kadowaki-Woods ratio consistent with heavy fermion behavior. Susceptibility measurements predict a Kondo temperature $T_K\approx 4K$, however the minimum found in the low temperature resistivity appears at a higher temperature $T\approx 10K$. A small fraction of the material ($<0.5\%$) becomes superconducting with a critical temperature $T_c\approx 4.2K$.

我们报告了P​​r _0.5 Ir ₄ Sb _10.2 Sn _1.8的单晶体的性质，Pr _0.5 Ir ₄ Sb _10.2 Sn _1.8是一种新的部分填充的稀土方钴矿，具有近藤合金和重的费米子行为。使用磁化率，比热和电阻率测量结果，我们发现了对f矩进行近藤筛选的证据。该材料显示出与重费米子行为一致的Kadowaki-Woods比。磁化率测量可预测近藤温度${Ť}_{ķ}\approx 4ķ$但是，低温电阻率的最小值出现在较高温度下 $Ť\approx 10ķ$。一小部分材料（$<0.5％$）在临界温度下变得超导 ${Ť}_C\approx 4.2ķ$。