Anomalous field-insensitive heavy-fermion state in SmOs4Sb12

Y. Aoki; S. Sanada; H. Aoki; D. Kikuchi; H. Sugawara; H. Sato

doi:10.1016/j.physb.2006.01.002

Anomalous field-insensitive heavy-fermion state in SmOs₄Sb₁₂

Y. Aoki, S. Sanada, H. Aoki, D. Kikuchi, H. Sugawara, H. Sato

Science

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

13 Citations (Scopus)

Abstract

Extraordinary field-insensitive heavy-fermion (HF) state has been recently discovered in the filled-skutterudite SmOs₄Sb₁₂. Thermodynamic analysis indicates that weak temperature dependence of magnetization reflects the field insensitiveness of the HF state. The observed magnetic anisotropy is qualitatively consistent with a quartet crystalline-electric-field (CEF) ground state of Sm ions. Largely suppressed magnetization suggests screening of Sm magnetic moments taking place in the HF state.

Original language	English
Pages (from-to)	54-55
Number of pages	2
Journal	Physica B: Condensed Matter
Volume	378-380
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.physb.2006.01.002
Publication status	Published - 2006 May 1

Keywords

Filled skutterudite
Heavy fermion
Kadowaki-Woods relation
SmOsSb

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1016/j.physb.2006.01.002

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title = "Anomalous field-insensitive heavy-fermion state in SmOs4Sb12",

abstract = "Extraordinary field-insensitive heavy-fermion (HF) state has been recently discovered in the filled-skutterudite SmOs4Sb12. Thermodynamic analysis indicates that weak temperature dependence of magnetization reflects the field insensitiveness of the HF state. The observed magnetic anisotropy is qualitatively consistent with a quartet crystalline-electric-field (CEF) ground state of Sm ions. Largely suppressed magnetization suggests screening of Sm magnetic moments taking place in the HF state.",

keywords = "Filled skutterudite, Heavy fermion, Kadowaki-Woods relation, SmOsSb",

author = "Y. Aoki and S. Sanada and H. Aoki and D. Kikuchi and H. Sugawara and H. Sato",

note = "Funding Information: This work was supported by a Grant-in-Aid for Scientific Research Priority Area “Skutterudite” (No. 15072206) from MEXT of Japan. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.",

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AU - Aoki, Y.

AU - Sanada, S.

AU - Aoki, H.

AU - Kikuchi, D.

AU - Sugawara, H.

AU - Sato, H.

N1 - Funding Information: This work was supported by a Grant-in-Aid for Scientific Research Priority Area “Skutterudite” (No. 15072206) from MEXT of Japan. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.

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N2 - Extraordinary field-insensitive heavy-fermion (HF) state has been recently discovered in the filled-skutterudite SmOs4Sb12. Thermodynamic analysis indicates that weak temperature dependence of magnetization reflects the field insensitiveness of the HF state. The observed magnetic anisotropy is qualitatively consistent with a quartet crystalline-electric-field (CEF) ground state of Sm ions. Largely suppressed magnetization suggests screening of Sm magnetic moments taking place in the HF state.

AB - Extraordinary field-insensitive heavy-fermion (HF) state has been recently discovered in the filled-skutterudite SmOs4Sb12. Thermodynamic analysis indicates that weak temperature dependence of magnetization reflects the field insensitiveness of the HF state. The observed magnetic anisotropy is qualitatively consistent with a quartet crystalline-electric-field (CEF) ground state of Sm ions. Largely suppressed magnetization suggests screening of Sm magnetic moments taking place in the HF state.

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KW - Heavy fermion

KW - Kadowaki-Woods relation

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