An EXAFS study on the local structure in the Na2CsC60 superconductor

T. Fujimoto; Y. Kubozono; H. Maeda; H. Ishida; Y. Furukawa; S. Kashino; H. Yamazaki

doi:10.1016/0921-4534(95)00274-X

An EXAFS study on the local structure in the Na₂CsC₆₀ superconductor

T. Fujimoto, Y. Kubozono, H. Maeda, H. Ishida, Y. Furukawa, S. Kashino, H. Yamazaki

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

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Abstract

Cs K-edge extended X-ray absorption fine structure (EXAFS) spectra of Na₂CsC₆₀ are measured in order to determine the local structure around the Cs⁺ ion. The structural change accompanied by the order-disorder phase transition at 299 K is investigated in detail on the basis of the EXAFS spectra at 20, 295 and 317 K. It has been confirmed that Na₂CsC₆₀ takes a face-centered-cubic structure at 317 K, while it takes a simple-cubic structure at 20 and 295 K. It has also been found that the Cs⁺ ion at the octahedral site is not located out-of-center of the octahedral site but is located on the center.

Original language	English
Pages (from-to)	5-11
Number of pages	7
Journal	Physica C: Superconductivity and its applications
Volume	249
Issue number	1-2
DOIs	https://doi.org/10.1016/0921-4534(95)00274-X
Publication status	Published - Jul 1 1995

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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title = "An EXAFS study on the local structure in the Na2CsC60 superconductor",

abstract = "Cs K-edge extended X-ray absorption fine structure (EXAFS) spectra of Na2CsC60 are measured in order to determine the local structure around the Cs+ ion. The structural change accompanied by the order-disorder phase transition at 299 K is investigated in detail on the basis of the EXAFS spectra at 20, 295 and 317 K. It has been confirmed that Na2CsC60 takes a face-centered-cubic structure at 317 K, while it takes a simple-cubic structure at 20 and 295 K. It has also been found that the Cs+ ion at the octahedral site is not located out-of-center of the octahedral site but is located on the center.",

author = "T. Fujimoto and Y. Kubozono and H. Maeda and H. Ishida and Y. Furukawa and S. Kashino and H. Yamazaki",

note = "Funding Information: The authors would like to thank I. Hirosawa of Fundamental Research Laboratories, NEC Corporation for providing Na2CsC60(B) and K. Oshima for his helpful discussion. We would like to express our thanks to S. Kishimoto and T. Usami of the Photon Factory (KEK) for their kind assistance and hospitality. This work has been performed under a proposal of Photon Factory Program Advisory Committee (Proposal No. 93G178) and supported by the Grant-in-Aid (06224220) from the Ministry of Education, Science and Culture, Japan.",

year = "1995",

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doi = "10.1016/0921-4534(95)00274-X",

language = "English",

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T1 - An EXAFS study on the local structure in the Na2CsC60 superconductor

AU - Fujimoto, T.

AU - Kubozono, Y.

AU - Maeda, H.

AU - Ishida, H.

AU - Furukawa, Y.

AU - Kashino, S.

AU - Yamazaki, H.

N1 - Funding Information: The authors would like to thank I. Hirosawa of Fundamental Research Laboratories, NEC Corporation for providing Na2CsC60(B) and K. Oshima for his helpful discussion. We would like to express our thanks to S. Kishimoto and T. Usami of the Photon Factory (KEK) for their kind assistance and hospitality. This work has been performed under a proposal of Photon Factory Program Advisory Committee (Proposal No. 93G178) and supported by the Grant-in-Aid (06224220) from the Ministry of Education, Science and Culture, Japan.

PY - 1995/7/1

Y1 - 1995/7/1

N2 - Cs K-edge extended X-ray absorption fine structure (EXAFS) spectra of Na2CsC60 are measured in order to determine the local structure around the Cs+ ion. The structural change accompanied by the order-disorder phase transition at 299 K is investigated in detail on the basis of the EXAFS spectra at 20, 295 and 317 K. It has been confirmed that Na2CsC60 takes a face-centered-cubic structure at 317 K, while it takes a simple-cubic structure at 20 and 295 K. It has also been found that the Cs+ ion at the octahedral site is not located out-of-center of the octahedral site but is located on the center.

AB - Cs K-edge extended X-ray absorption fine structure (EXAFS) spectra of Na2CsC60 are measured in order to determine the local structure around the Cs+ ion. The structural change accompanied by the order-disorder phase transition at 299 K is investigated in detail on the basis of the EXAFS spectra at 20, 295 and 317 K. It has been confirmed that Na2CsC60 takes a face-centered-cubic structure at 317 K, while it takes a simple-cubic structure at 20 and 295 K. It has also been found that the Cs+ ion at the octahedral site is not located out-of-center of the octahedral site but is located on the center.

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An EXAFS study on the local structure in the Na₂CsC₆₀ superconductor

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