Sb-NQR study of the "kondo semiconductor" CeOs4Sb 12

M. Yogi; H. Kotegawa; G. Q. Zheng; Y. Kitaoka; S. Osaki; H. Sugawara; H. Sato

doi:10.1016/j.jmmm.2003.12.448

Sb-NQR study of the "kondo semiconductor" CeOs₄Sb ₁₂

M. Yogi, H. Kotegawa, G. Q. Zheng, Y. Kitaoka, S. Osaki, H. Sugawara, H. Sato

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

2 Citations (Scopus)

Abstract

We report novel phase transition at ∼0.9 K in the Ce-based filled-skutterudite compound CeOs₄Sb₁₂ via the measurements of nuclear-spin-lattice-relaxation-rate l/T₁ and ¹²³Sb-NQR spectrum. The temperature (T) dependence of 1/T₁ follows 1/T₁ ∝ (T - θ)^1/2 with θ = 0.06 K in the range of 1.3 K<T<25K, suggesting that the system is close to an antiferromagnetic critical point. The onset of spin-density-wave (SDW) order at T_SDW ∼0.9 K is evidenced by the broadening of NQR spectrum and marked reduction in 1/T₁ just below T_SDW.

Original language	English
Pages (from-to)	e45-e46
Journal	Journal of Magnetism and Magnetic Materials
Volume	272-276
Issue number	SUPPL. 1
DOIs	https://doi.org/10.1016/j.jmmm.2003.12.448
Publication status	Published - May 2004
Externally published	Yes

Keywords

Filled skutterudite compounds
Heavy-fermion
Kondo insulator
Sb-NQR

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1016/j.jmmm.2003.12.448

Cite this

@article{3bf79e61d6e6493189c3adf59098c548,

title = "Sb-NQR study of the {"}kondo semiconductor{"} CeOs4Sb 12",

abstract = "We report novel phase transition at ∼0.9 K in the Ce-based filled-skutterudite compound CeOs4Sb12 via the measurements of nuclear-spin-lattice-relaxation-rate l/T1 and 123Sb-NQR spectrum. The temperature (T) dependence of 1/T1 follows 1/T1 ∝ (T - θ)1/2 with θ = 0.06 K in the range of 1.3 K<T<25K, suggesting that the system is close to an antiferromagnetic critical point. The onset of spin-density-wave (SDW) order at TSDW ∼0.9 K is evidenced by the broadening of NQR spectrum and marked reduction in 1/T1 just below TSDW.",

keywords = "Filled skutterudite compounds, Heavy-fermion, Kondo insulator, Sb-NQR",

author = "M. Yogi and H. Kotegawa and Zheng, {G. Q.} and Y. Kitaoka and S. Osaki and H. Sugawara and H. Sato",

note = "Funding Information: We thank H. Harima for helpful comments. This work was supported by the COE Research (10CE2004) in Grant-in-Aid for Scientific Research from the Ministry of Education, Sport, Science and Culture of Japan.",

year = "2004",

month = may,

doi = "10.1016/j.jmmm.2003.12.448",

language = "English",

volume = "272-276",

pages = "e45--e46",

journal = "Journal of Magnetism and Magnetic Materials",

issn = "0304-8853",

publisher = "Elsevier",

number = "SUPPL. 1",

}

TY - JOUR

T1 - Sb-NQR study of the "kondo semiconductor" CeOs4Sb 12

AU - Yogi, M.

AU - Kotegawa, H.

AU - Zheng, G. Q.

AU - Kitaoka, Y.

AU - Osaki, S.

AU - Sugawara, H.

AU - Sato, H.

N1 - Funding Information: We thank H. Harima for helpful comments. This work was supported by the COE Research (10CE2004) in Grant-in-Aid for Scientific Research from the Ministry of Education, Sport, Science and Culture of Japan.

PY - 2004/5

Y1 - 2004/5

N2 - We report novel phase transition at ∼0.9 K in the Ce-based filled-skutterudite compound CeOs4Sb12 via the measurements of nuclear-spin-lattice-relaxation-rate l/T1 and 123Sb-NQR spectrum. The temperature (T) dependence of 1/T1 follows 1/T1 ∝ (T - θ)1/2 with θ = 0.06 K in the range of 1.3 K<T<25K, suggesting that the system is close to an antiferromagnetic critical point. The onset of spin-density-wave (SDW) order at TSDW ∼0.9 K is evidenced by the broadening of NQR spectrum and marked reduction in 1/T1 just below TSDW.

AB - We report novel phase transition at ∼0.9 K in the Ce-based filled-skutterudite compound CeOs4Sb12 via the measurements of nuclear-spin-lattice-relaxation-rate l/T1 and 123Sb-NQR spectrum. The temperature (T) dependence of 1/T1 follows 1/T1 ∝ (T - θ)1/2 with θ = 0.06 K in the range of 1.3 K<T<25K, suggesting that the system is close to an antiferromagnetic critical point. The onset of spin-density-wave (SDW) order at TSDW ∼0.9 K is evidenced by the broadening of NQR spectrum and marked reduction in 1/T1 just below TSDW.

KW - Filled skutterudite compounds

KW - Heavy-fermion

KW - Kondo insulator

KW - Sb-NQR

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U2 - 10.1016/j.jmmm.2003.12.448

DO - 10.1016/j.jmmm.2003.12.448

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AN - SCOPUS:20144374075

SN - 0304-8853

VL - 272-276

SP - e45-e46

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

IS - SUPPL. 1

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