Specific heat of La (Os1 - x Rux)4 Sb12

G. Yoshino, K. Katoh, Y. Niide, A. Ochiai

Research output: Contribution to journalArticlepeer-review

Abstract

We have grown single crystals of filled skutterudites La (Os1 - x Rux)4 Sb12 and unfilled skutterudites RhSb3 and IrSb3. We measured their specific heat to investigate the rattling motion of rare earth ions in the oversized Sb-cage. To evaluate the contribution of the La motion to the specific heat (Δ C), we subtracted the specific heat of RhSb3 or IrSb3 from that of La (Os1 - x Rux)4 Sb12. ΔC has a shoulder structure around 15 K and is well fitted by the Einstein model. Einstein temperature obtained from the fitting increases with increasing Ru-content x, whereas the number of Einstein oscillators decreases with x.

Original languageEnglish
Pages (from-to)e4
JournalJournal of Magnetism and Magnetic Materials
Volume310
Issue number2 SUPPL. PART 1
DOIs
Publication statusPublished - 2007 Mar

Keywords

  • Filled skutterudite
  • LaOs Sb
  • LaRu Sb
  • Specific heat

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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