Elastic properties of the filled and unfilled skutterudite compounds

Y. Nakanishi, T. Fujino, F. Kikuchi, T. Tanizawa, P. Sun, M. Nakamura, G. Yoshino, A. Ochiai, H. Sugawara, D. Kikuchi, H. Sato, M. Yoshizawa

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4 Citations (Scopus)


Ultrasonic measurements were made on a single crystal of the unfilled skutterudite compounds RhSb3 and IrSb3 and compare with that of the filled skutterudite PrOs4 Sb12 to elucidate the role of the guest ions Pr. A characteristic increase was observed around 30 K in the temperature dependence of elastic constants (C11-C 12)/2 and C44 which is ascribed to unusual vibration "rattling" of Pr ions in an atomic cage formed by Sb-icosahedron. On the other hand, the elastic constants C11, (C11-C 12)/2 and C44 increase monotonically with decreasing temperature in the case of RhSb3 and IrSb3. No such a characteristic increase was observed. These results give us a piece of evidence that the guest ions would play a crucial role for "rattling motion" in filled skutterudite compounds.

Original languageEnglish
Article number012072
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 2007 Dec 1
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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