Orbital ordering of intermediate-spin state of Co3+ in Sr 3YCo4O10.5

Hironori Nakao, Tetsuya Murata, Daisuke Bizen, Youichi Murakami, Kenji Ohoyama, Kazuyoshi Yamada, Shintaro Ishiwata, Wataru Kobayashi, Ichiro Terasaki

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    Abstract

    The orbital ordering and spin state in the room-temperature ferromagnet Sr3YCo4O10.5 were investigated by a resonant X-ray scattering technique. A resonating signal with a σ → π' scattering component was observed at (h00), where h = 2n + 1 (n: integer), near the 1s → eg transition energy of Co. This provides direct evidence of not only eg orbital ordering but also the existence of the intermediate-spin (IS) state. Moreover, we suggest that the ferrimagnetism is induced by the eg orbital ordering of the IS state of Co3+. The peculiar eg orbital, spin-state, and magnetic orderings are also discussed.

    Original languageEnglish
    Article number023711
    JournalJournal of the Physical Society of Japan
    Volume80
    Issue number2
    DOIs
    Publication statusPublished - 2011 Feb

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    Keywords

    • Co intermediate spin-state
    • Orbital ordering
    • Resonant X-ray scattering
    • Spin-state ordering

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

    Cite this

    Nakao, H., Murata, T., Bizen, D., Murakami, Y., Ohoyama, K., Yamada, K., Ishiwata, S., Kobayashi, W., & Terasaki, I. (2011). Orbital ordering of intermediate-spin state of Co3+ in Sr 3YCo4O10.5. Journal of the Physical Society of Japan, 80(2), [023711]. https://doi.org/10.1143/JPSJ.80.023711