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

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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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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.",
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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

TY - JOUR

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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