Oxygen ordering and mobility in YBaCo4O7+δ

Y. Jia, Hua Jiang (Corresponding Author), Mika Valkeapää, H. Yamauchi, Mikko Karppinen, Esko I. Kauppinen

    Research output: Contribution to journalArticleScientificpeer-review

    34 Citations (Scopus)

    Abstract

    Extraordinary oxygen ordering and mobility have been found in an oxygen-nonstoichiometric mixed-valence cobalt oxide, YBaCo4O8.5. The excess oxygen atoms appear to be incorporated in an orderly way into the YBaCo4O7 parent lattice with different configurations as the oxygen content varies. Intense electron-beam irradiation was used to observe recurrent oxygen migration in the lattice, causing reversible structural modulation transitions. The oxygen migration can be attributed mainly to the electron-beam heating effect. This study highlights the high degree of freedom of surplus oxygen within the investigated structure and advances our understanding of the oxygen diffusion process in related transition-metal oxide systems.
    Original languageEnglish
    Pages (from-to)4880-4883
    Number of pages4
    JournalJournal of the American Chemical Society
    Volume131
    Issue number13
    DOIs
    Publication statusPublished - 2009
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Oxygen
    Electron beams
    Electrons
    Oxides
    Heating
    Transition metals
    Cobalt
    Metals
    Modulation
    Irradiation
    Atoms

    Keywords

    • oxygen
    • oxygen ordering
    • oxygen mobility
    • cobalt oxide
    • oxygen diffusion
    • transition metal alloys
    • transition metals

    Cite this

    Jia, Y., Jiang, H., Valkeapää, M., Yamauchi, H., Karppinen, M., & Kauppinen, E. I. (2009). Oxygen ordering and mobility in YBaCo4O7+δ. Journal of the American Chemical Society, 131(13), 4880-4883. https://doi.org/10.1021/ja809745k
    Jia, Y. ; Jiang, Hua ; Valkeapää, Mika ; Yamauchi, H. ; Karppinen, Mikko ; Kauppinen, Esko I. / Oxygen ordering and mobility in YBaCo4O7+δ. In: Journal of the American Chemical Society. 2009 ; Vol. 131, No. 13. pp. 4880-4883.
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    title = "Oxygen ordering and mobility in YBaCo4O7+δ",
    abstract = "Extraordinary oxygen ordering and mobility have been found in an oxygen-nonstoichiometric mixed-valence cobalt oxide, YBaCo4O8.5. The excess oxygen atoms appear to be incorporated in an orderly way into the YBaCo4O7 parent lattice with different configurations as the oxygen content varies. Intense electron-beam irradiation was used to observe recurrent oxygen migration in the lattice, causing reversible structural modulation transitions. The oxygen migration can be attributed mainly to the electron-beam heating effect. This study highlights the high degree of freedom of surplus oxygen within the investigated structure and advances our understanding of the oxygen diffusion process in related transition-metal oxide systems.",
    keywords = "oxygen, oxygen ordering, oxygen mobility, cobalt oxide, oxygen diffusion, transition metal alloys, transition metals",
    author = "Y. Jia and Hua Jiang and Mika Valkeap{\"a}{\"a} and H. Yamauchi and Mikko Karppinen and Kauppinen, {Esko I.}",
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    Jia, Y, Jiang, H, Valkeapää, M, Yamauchi, H, Karppinen, M & Kauppinen, EI 2009, 'Oxygen ordering and mobility in YBaCo4O7+δ', Journal of the American Chemical Society, vol. 131, no. 13, pp. 4880-4883. https://doi.org/10.1021/ja809745k

    Oxygen ordering and mobility in YBaCo4O7+δ. / Jia, Y.; Jiang, Hua (Corresponding Author); Valkeapää, Mika; Yamauchi, H.; Karppinen, Mikko; Kauppinen, Esko I.

    In: Journal of the American Chemical Society, Vol. 131, No. 13, 2009, p. 4880-4883.

    Research output: Contribution to journalArticleScientificpeer-review

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    T1 - Oxygen ordering and mobility in YBaCo4O7+δ

    AU - Jia, Y.

    AU - Jiang, Hua

    AU - Valkeapää, Mika

    AU - Yamauchi, H.

    AU - Karppinen, Mikko

    AU - Kauppinen, Esko I.

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    AB - Extraordinary oxygen ordering and mobility have been found in an oxygen-nonstoichiometric mixed-valence cobalt oxide, YBaCo4O8.5. The excess oxygen atoms appear to be incorporated in an orderly way into the YBaCo4O7 parent lattice with different configurations as the oxygen content varies. Intense electron-beam irradiation was used to observe recurrent oxygen migration in the lattice, causing reversible structural modulation transitions. The oxygen migration can be attributed mainly to the electron-beam heating effect. This study highlights the high degree of freedom of surplus oxygen within the investigated structure and advances our understanding of the oxygen diffusion process in related transition-metal oxide systems.

    KW - oxygen

    KW - oxygen ordering

    KW - oxygen mobility

    KW - cobalt oxide

    KW - oxygen diffusion

    KW - transition metal alloys

    KW - transition metals

    U2 - 10.1021/ja809745k

    DO - 10.1021/ja809745k

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    JO - Journal of the American Chemical Society

    JF - Journal of the American Chemical Society

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