NMR studies of Ba8Ga16Sn30 clathrates

H. Tou; K. Sonoda; Y. Nishikawa; H. Kotegawa; H. Suekuni; T. Onimaru; T. Takabatake

doi:10.1143/JPSJS.80SA.SA039

NMR studies of Ba₈Ga₁₆Sn₃₀ clathrates

H. Tou, K. Sonoda, Y. Nishikawa, H. Kotegawa, H. Suekuni, T. Onimaru, T. Takabatake

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

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Abstract

Nuclear Magnetic Resonance measurements have been carried out in type VIII Ba₈Ga₁₆Sn₃₀ (α-BGS) and type I Ba ₈Ga₁₆Sn₃₀ (3-BGS) clathrates having caged structure. We have observed Sn-and Ga-NMR spectra for both clathrates. Characteristic Sn-NMR line profiles for both clathrates can be explained by taking account of the crystallographic sites in the framework of cages. We have also measured nuclear spin-spin relaxation rate 1/T₂ in α-BGS. 1/T₂ weakly depends temperature, but it is drastically suppressed with increasing resonance frequency. These results strongly suggest that the guest Ba ions vibrates at on-center location with characteristic correlation time of ≈ 10^-8 s.

Original language	English
Article number	SA039
Journal	journal of the physical society of japan
Volume	80
Issue number	SUPPL. A
DOIs	https://doi.org/10.1143/JPSJS.80SA.SA039
Publication status	Published - Jul 2011
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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title = "NMR studies of Ba8Ga16Sn30 clathrates",

abstract = "Nuclear Magnetic Resonance measurements have been carried out in type VIII Ba8Ga16Sn30 (α-BGS) and type I Ba 8Ga16Sn30 (3-BGS) clathrates having caged structure. We have observed Sn-and Ga-NMR spectra for both clathrates. Characteristic Sn-NMR line profiles for both clathrates can be explained by taking account of the crystallographic sites in the framework of cages. We have also measured nuclear spin-spin relaxation rate 1/T2 in α-BGS. 1/T2 weakly depends temperature, but it is drastically suppressed with increasing resonance frequency. These results strongly suggest that the guest Ba ions vibrates at on-center location with characteristic correlation time of ≈ 10-8 s.",

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T1 - NMR studies of Ba8Ga16Sn30 clathrates

AU - Tou, H.

AU - Sonoda, K.

AU - Nishikawa, Y.

AU - Kotegawa, H.

AU - Suekuni, H.

AU - Onimaru, T.

AU - Takabatake, T.

PY - 2011/7

Y1 - 2011/7

N2 - Nuclear Magnetic Resonance measurements have been carried out in type VIII Ba8Ga16Sn30 (α-BGS) and type I Ba 8Ga16Sn30 (3-BGS) clathrates having caged structure. We have observed Sn-and Ga-NMR spectra for both clathrates. Characteristic Sn-NMR line profiles for both clathrates can be explained by taking account of the crystallographic sites in the framework of cages. We have also measured nuclear spin-spin relaxation rate 1/T2 in α-BGS. 1/T2 weakly depends temperature, but it is drastically suppressed with increasing resonance frequency. These results strongly suggest that the guest Ba ions vibrates at on-center location with characteristic correlation time of ≈ 10-8 s.

AB - Nuclear Magnetic Resonance measurements have been carried out in type VIII Ba8Ga16Sn30 (α-BGS) and type I Ba 8Ga16Sn30 (3-BGS) clathrates having caged structure. We have observed Sn-and Ga-NMR spectra for both clathrates. Characteristic Sn-NMR line profiles for both clathrates can be explained by taking account of the crystallographic sites in the framework of cages. We have also measured nuclear spin-spin relaxation rate 1/T2 in α-BGS. 1/T2 weakly depends temperature, but it is drastically suppressed with increasing resonance frequency. These results strongly suggest that the guest Ba ions vibrates at on-center location with characteristic correlation time of ≈ 10-8 s.

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NMR studies of Ba₈Ga₁₆Sn₃₀ clathrates

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