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 language | English |
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Pages (from-to) | e4 |
Journal | Journal of Magnetism and Magnetic Materials |
Volume | 310 |
Issue number | 2 SUPPL. PART 1 |
DOIs | |
Publication status | Published - 2007 Mar |
Keywords
- Filled skutterudite
- LaOs Sb
- LaRu Sb
- Specific heat
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics