Anomalous double-stripe charge ordering in β- NaFe2 O3 with double triangular layers consisting of almost perfect regular Fe4 tetrahedra

Shintaro Kobayashi, Hiroaki Ueda, Chishiro Michioka, Kazuyoshi Yoshimura, Shin Nakamura, Takuro Katsufuji, Hiroshi Sawa

    研究成果: Article

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    The physical properties of the mixed-valent iron oxide β-NaFe2O3 were investigated by means of synchrotron radiation x-ray diffraction, magnetization, electrical resistivity, differential scanning calorimetry, Na23 NMR, and Fe57Mössbauer measurements. This compound has double triangular layers consisting of almost perfect regular Fe4 tetrahedra, which suggests geometrical frustration. We found that this compound exhibits an electrostatically unstable double-stripe-type charge ordering, which is stabilized by the cooperative compression of Fe3+O6 octahedra, owing to a valence change and Fe2+O6 octahedra due to Jahn-Teller distortion. Our results indicate the importance of electron-phonon coupling for charge ordering in the region of strong charge frustration.

    元の言語English
    記事番号054402
    ジャーナルPhysical Review Materials
    2
    発行部数5
    DOI
    出版物ステータスPublished - 2018 5 7

    ASJC Scopus subject areas

    • Materials Science(all)
    • Physics and Astronomy (miscellaneous)

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