Off-center rattling and tunneling in filled skutterudite LaOs 4Sb12

Yuri Yasumoto; Akio Yamaguchi; Tatsuya Yanagisawa; Yuichi Nemoto; Terutaka Goto; Akira Ochiai

doi:10.1143/JPSJS.77SA.242

Off-center rattling and tunneling in filled skutterudite LaOs ₄Sb₁₂

Yuri Yasumoto, Akio Yamaguchi, Tatsuya Yanagisawa, Yuichi Nemoto, Terutaka Goto, Akira Ochiai

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

7 Citations (Scopus)

Abstract

Off-center rattling of La-ion in the filled skutterudite compound LaOs ₄Sb₁₂ has been investigated by means of ultrasonic measurements. An elastic constant C₁₁ shows a remarkable frequency dependence in elastic constant and ultrasonic attenuation at around 25 K. This frequency dependent ultrasonic dispersion reveals thermally activated Γ₂₃-type off-center rattling of La-ion. An attempt time τ₀ = 5.0×10^-11 sec and an activation energy E = 127 K were obtained from the analysis.

Original language	English
Pages (from-to)	242-244
Number of pages	3
Journal	journal of the physical society of japan
Volume	77
Issue number	SUPPL.A
DOIs	https://doi.org/10.1143/JPSJS.77SA.242
Publication status	Published - 2008
Externally published	Yes

Keywords

Elastic constant
Filled skutterudite
Off-center
Rattling
Ultrasonic attenuation

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJS.77SA.242

Cite this

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title = "Off-center rattling and tunneling in filled skutterudite LaOs 4Sb12",

abstract = "Off-center rattling of La-ion in the filled skutterudite compound LaOs 4Sb12 has been investigated by means of ultrasonic measurements. An elastic constant C11 shows a remarkable frequency dependence in elastic constant and ultrasonic attenuation at around 25 K. This frequency dependent ultrasonic dispersion reveals thermally activated Γ23-type off-center rattling of La-ion. An attempt time τ0 = 5.0×10-11 sec and an activation energy E = 127 K were obtained from the analysis.",

keywords = "Elastic constant, Filled skutterudite, Off-center, Rattling, Ultrasonic attenuation",

author = "Yuri Yasumoto and Akio Yamaguchi and Tatsuya Yanagisawa and Yuichi Nemoto and Terutaka Goto and Akira Ochiai",

year = "2008",

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language = "English",

volume = "77",

pages = "242--244",

journal = "Journal of the Physical Society of Japan",

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publisher = "Physical Society of Japan",

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TY - JOUR

T1 - Off-center rattling and tunneling in filled skutterudite LaOs 4Sb12

AU - Yasumoto, Yuri

AU - Yamaguchi, Akio

AU - Yanagisawa, Tatsuya

AU - Nemoto, Yuichi

AU - Goto, Terutaka

AU - Ochiai, Akira

PY - 2008

Y1 - 2008

N2 - Off-center rattling of La-ion in the filled skutterudite compound LaOs 4Sb12 has been investigated by means of ultrasonic measurements. An elastic constant C11 shows a remarkable frequency dependence in elastic constant and ultrasonic attenuation at around 25 K. This frequency dependent ultrasonic dispersion reveals thermally activated Γ23-type off-center rattling of La-ion. An attempt time τ0 = 5.0×10-11 sec and an activation energy E = 127 K were obtained from the analysis.

AB - Off-center rattling of La-ion in the filled skutterudite compound LaOs 4Sb12 has been investigated by means of ultrasonic measurements. An elastic constant C11 shows a remarkable frequency dependence in elastic constant and ultrasonic attenuation at around 25 K. This frequency dependent ultrasonic dispersion reveals thermally activated Γ23-type off-center rattling of La-ion. An attempt time τ0 = 5.0×10-11 sec and an activation energy E = 127 K were obtained from the analysis.

KW - Elastic constant

KW - Filled skutterudite

KW - Off-center

KW - Rattling

KW - Ultrasonic attenuation

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JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

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