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 journalArticlepeer-review

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

Keywords

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

ASJC Scopus subject areas

  • Radiation
  • Nuclear and High Energy Physics
  • Instrumentation

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