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Site-selective doping of ordered charge states in magnetite

Author

Listed:
  • E. Pachoud

    (University of Edinburgh)

  • J. Cumby

    (University of Edinburgh)

  • G. Perversi

    (University of Edinburgh)

  • J. P. Wright

    (European Synchrotron Radiation Facility)

  • J. P. Attfield

    (University of Edinburgh)

Abstract

Charge ordering creates a spontaneous array of differently charged ions and is associated with electronic phenomena such as superconductivity, colossal magnetoresistances (CMR), and multiferroicity. Charge orders are usually suppressed by chemical doping and site selective doping of a charge ordered array has not previously been demonstrated. Here we show that selective oxidation of one out of eight distinct Fe2+ sites occurs within the complex Fe2+/Fe3+ ordered structure of 2%-doped magnetite (Fe3O4), while the rest of the charge and orbitally ordered network remains intact. This ‘charge order within a charge order’ is attributed to the relative instability of the trimeron distortion surrounding the selected site. Our discovery suggests that similar complex charge ordered arrays could be used to provide surface sites for selective redox reactions, or for storing information by doping specific sites.

Suggested Citation

  • E. Pachoud & J. Cumby & G. Perversi & J. P. Wright & J. P. Attfield, 2020. "Site-selective doping of ordered charge states in magnetite," Nature Communications, Nature, vol. 11(1), pages 1-5, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-15504-5
    DOI: 10.1038/s41467-020-15504-5
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    Cited by:

    1. Taehun Kim & Sangwoo Sim & Sumin Lim & Midori Amano Patino & Jaeyoung Hong & Jisoo Lee & Taeghwan Hyeon & Yuichi Shimakawa & Soonchil Lee & J. Paul Attfield & Je-Geun Park, 2021. "Slow oxidation of magnetite nanoparticles elucidates the limits of the Verwey transition," Nature Communications, Nature, vol. 12(1), pages 1-6, December.

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