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摘要: 结合Rietveld结构解析和拉曼光谱对单相多晶的Sm原子填充的skutterudite化合物SmyFexCo4-xSb12进行了分析.Rietveld精确化结果表明:SmyFexCo4-xSb12化合物具有填充式skutterudite结构,Sm原
Abstract: The single-phase polycrystalline Sm-filled skutterudites SmyFexCo4-xSb12 were investigated by Rietveld refinement and Raman scattering spectral analysis. The results of Rietveld refinement clarify that the SmyFexCo4-xSb12 compound has a filled skutterudite structure. The thermal parameter of Sm is larger than that of Sb, Fe and Co, and the Sb-Sb bond length of SmyFexCo4-xSb12 is longer than that of unfilled skutterudites. The results of Raman scattering study show a shift and broadening of the Sb4 ring breathing modes. These results indicate that Sm atoms fill the Sb-icosahedron voids of the skutterudites and rattle in them.