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

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

doi:10.1016/j.jmmm.2006.10.037

Specific heat of La (Os_{1 - x} Ru_x)₄ Sb₁₂

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

SCI - Physics

Research output: Contribution to journal › Article › peer-review

Abstract

We have grown single crystals of filled skutterudites La (Os_{1 - x} Ru_x)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 (Os_{1 - x} Ru_x)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
Pages (from-to)	e4
Journal	Journal of Magnetism and Magnetic Materials
Volume	310
Issue number	2 SUPPL. PART 1
DOIs	https://doi.org/10.1016/j.jmmm.2006.10.037
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

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title = "Specific heat of La (Os1 - x Rux)4 Sb12 ",

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.",

keywords = "Filled skutterudite, LaOs Sb, LaRu Sb, Specific heat",

author = "G. Yoshino and K. Katoh and Y. Niide and A. Ochiai",

note = "Funding Information: This work was partially supported by a Grant-in Aid for Scientific Research and a 21st Century COE Program of the Ministry of Education, Culture, Sports, Science and Technology.",

year = "2007",

month = mar,

doi = "10.1016/j.jmmm.2006.10.037",

language = "English",

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journal = "Journal of Magnetism and Magnetic Materials",

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TY - JOUR

T1 - Specific heat of La (Os1 - x Rux)4 Sb12

AU - Yoshino, G.

AU - Katoh, K.

AU - Niide, Y.

AU - Ochiai, A.

N1 - Funding Information: This work was partially supported by a Grant-in Aid for Scientific Research and a 21st Century COE Program of the Ministry of Education, Culture, Sports, Science and Technology.

PY - 2007/3

Y1 - 2007/3

N2 - 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.

AB - 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.

KW - Filled skutterudite

KW - LaOs Sb

KW - LaRu Sb

KW - Specific heat

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