XAFS studies of the oxidation process in RbxCsyC60 (x=3, y=0 and x=2, y=1)

Yoshihiro Kubozono, Tamotsu Fujimoto, Hironobu Maeda, Akiko Hirano, Setsuo Kashino, Kokichi Oshima, Hitoshi Yamazaki, Hiroyuki Ishida, Tadao Ishii, Shuichi Emura, Kiyonori Kato

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Abstract

EXAFS measurements of the alkali-doped fullerence superconductors, RbxCsyC60 (x=3, y=0 and x=2, y=1 with Tc=30 and 31 K, respectively), have been made at the Rb K-edge as a function of exposure time to O2 gas. The distances rRb-C=3.35±0.02 and 3.31±0.02 Å were obtained for pristine RbxCsyC60 of x=3, y=0 and x=2, y=1, respectively, in good agreement with the reported value of 3.33 Å at the tetrahedral site determined by X-ray diffraction study. The analysis of the Rb-O EXAFS in Rb3C60 exposed to O2 for 40 h gives rRb-O=2.89±0.05 Å and N=4±1, consistent with the crystallographic values of rubidium oxide (Rb2O: rRb-O=2.91 Å and N=4 at room temperature). The result indicates that the Rb in RbxCsyC60 is converted into Rb2O through the oxidation.

Original languageEnglish
Pages (from-to)21-26
Number of pages6
JournalPhysica C: Superconductivity and its Applications
Volume217
Issue number1-2
DOIs
Publication statusPublished - Nov 10 1993

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Rubidium
Alkalies
rubidium
Oxides
Superconducting materials
alkalies
Gases
X ray diffraction
Oxidation
oxidation
oxides
room temperature
diffraction
gases
x rays
Temperature

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

XAFS studies of the oxidation process in RbxCsyC60 (x=3, y=0 and x=2, y=1). / Kubozono, Yoshihiro; Fujimoto, Tamotsu; Maeda, Hironobu; Hirano, Akiko; Kashino, Setsuo; Oshima, Kokichi; Yamazaki, Hitoshi; Ishida, Hiroyuki; Ishii, Tadao; Emura, Shuichi; Kato, Kiyonori.

In: Physica C: Superconductivity and its Applications, Vol. 217, No. 1-2, 10.11.1993, p. 21-26.

Research output: Contribution to journalArticle

Kubozono, Y, Fujimoto, T, Maeda, H, Hirano, A, Kashino, S, Oshima, K, Yamazaki, H, Ishida, H, Ishii, T, Emura, S & Kato, K 1993, 'XAFS studies of the oxidation process in RbxCsyC60 (x=3, y=0 and x=2, y=1)', Physica C: Superconductivity and its Applications, vol. 217, no. 1-2, pp. 21-26. https://doi.org/10.1016/0921-4534(93)90790-W
Kubozono, Yoshihiro ; Fujimoto, Tamotsu ; Maeda, Hironobu ; Hirano, Akiko ; Kashino, Setsuo ; Oshima, Kokichi ; Yamazaki, Hitoshi ; Ishida, Hiroyuki ; Ishii, Tadao ; Emura, Shuichi ; Kato, Kiyonori. / XAFS studies of the oxidation process in RbxCsyC60 (x=3, y=0 and x=2, y=1). In: Physica C: Superconductivity and its Applications. 1993 ; Vol. 217, No. 1-2. pp. 21-26.
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AU - Yamazaki, Hitoshi

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