XANES study of charge ordering on the spin-Peierls phase transition of α′-NaV2O5

Takahisa Shobu, Yukio Noda, Emi Ninomiya, Hiroshi Sawa, Shin Ichi Nagamatsu, Takashi Fujikawa, Yutaka Ueda, Masahiko Isobe, Naoshi Ikeda, Tomoya Uruga

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

α′-NaV2O5 transforms at TC = 34K, and the origin of the phase transition seems to be caused by the charge order and spin-Peierls mechanism. However the experiments which reveal the existence of charge order are very little. We measured XANES of V atoms which relates to the valence of V. It was found that the valences of V atoms in NaV2O5 were V4.5+ in the high temperature phase by comparing pre-edge and XANES of NaV2O5 with that of LiV2O5, CaV2O5 and V2O5. The analysis of EXAFS also shows the environment of the V4.5+ state.

Original languageEnglish
Pages (from-to)746-748
Number of pages3
JournalJournal of Synchrotron Radiation
Volume8
Issue number2
DOIs
Publication statusPublished - Mar 1 2001
Externally publishedYes

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Phase transitions
valence
Atoms
atoms
Experiments
Temperature

Keywords

  • α′-NaVO
  • Charge order
  • Spin-Peierls
  • XANES method

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Instrumentation
  • Atomic and Molecular Physics, and Optics
  • Radiation

Cite this

Shobu, T., Noda, Y., Ninomiya, E., Sawa, H., Nagamatsu, S. I., Fujikawa, T., ... Uruga, T. (2001). XANES study of charge ordering on the spin-Peierls phase transition of α′-NaV2O5. Journal of Synchrotron Radiation, 8(2), 746-748. https://doi.org/10.1107/S0909049500020872

XANES study of charge ordering on the spin-Peierls phase transition of α′-NaV2O5. / Shobu, Takahisa; Noda, Yukio; Ninomiya, Emi; Sawa, Hiroshi; Nagamatsu, Shin Ichi; Fujikawa, Takashi; Ueda, Yutaka; Isobe, Masahiko; Ikeda, Naoshi; Uruga, Tomoya.

In: Journal of Synchrotron Radiation, Vol. 8, No. 2, 01.03.2001, p. 746-748.

Research output: Contribution to journalArticle

Shobu, T, Noda, Y, Ninomiya, E, Sawa, H, Nagamatsu, SI, Fujikawa, T, Ueda, Y, Isobe, M, Ikeda, N & Uruga, T 2001, 'XANES study of charge ordering on the spin-Peierls phase transition of α′-NaV2O5', Journal of Synchrotron Radiation, vol. 8, no. 2, pp. 746-748. https://doi.org/10.1107/S0909049500020872
Shobu, Takahisa ; Noda, Yukio ; Ninomiya, Emi ; Sawa, Hiroshi ; Nagamatsu, Shin Ichi ; Fujikawa, Takashi ; Ueda, Yutaka ; Isobe, Masahiko ; Ikeda, Naoshi ; Uruga, Tomoya. / XANES study of charge ordering on the spin-Peierls phase transition of α′-NaV2O5. In: Journal of Synchrotron Radiation. 2001 ; Vol. 8, No. 2. pp. 746-748.
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AU - Sawa, Hiroshi

AU - Nagamatsu, Shin Ichi

AU - Fujikawa, Takashi

AU - Ueda, Yutaka

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