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

doi:10.1107/S0909049500020872

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 journal › Article › peer-review

1 Citation (Scopus)

Abstract

α′-NaV₂O₅ transforms at T_C = 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 V^4.5+ 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 V^4.5+ state.

Original language	English
Pages (from-to)	746-748
Number of pages	3
Journal	Journal of Synchrotron Radiation
Volume	8
Issue number	2
DOIs	https://doi.org/10.1107/S0909049500020872
Publication status	Published - Mar 1 2001
Externally published	Yes

Keywords

Charge order
Spin-Peierls
XANES method
α′-NaVO

ASJC Scopus subject areas

Radiation
Nuclear and High Energy Physics
Instrumentation

Access to Document

10.1107/S0909049500020872

Cite this

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title = "XANES study of charge ordering on the spin-Peierls phase transition of α′-NaV2O5",

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.",

keywords = "Charge order, Spin-Peierls, XANES method, α′-NaVO",

author = "Takahisa Shobu and Yukio Noda and Emi Ninomiya and Hiroshi Sawa and Nagamatsu, {Shin Ichi} and Takashi Fujikawa and Yutaka Ueda and Masahiko Isobe and Naoshi Ikeda and Tomoya Uruga",

year = "2001",

month = mar,

day = "1",

doi = "10.1107/S0909049500020872",

language = "English",

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journal = "Journal of Synchrotron Radiation",

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publisher = "International Union of Crystallography",

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TY - JOUR

T1 - XANES study of charge ordering on the spin-Peierls phase transition of α′-NaV2O5

AU - Shobu, Takahisa

AU - Noda, Yukio

AU - Ninomiya, Emi

AU - Sawa, Hiroshi

AU - Nagamatsu, Shin Ichi

AU - Fujikawa, Takashi

AU - Ueda, Yutaka

AU - Isobe, Masahiko

AU - Ikeda, Naoshi

AU - Uruga, Tomoya

PY - 2001/3/1

Y1 - 2001/3/1

N2 - 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.

AB - 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.

KW - Charge order

KW - Spin-Peierls

KW - XANES method

KW - α′-NaVO

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