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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31 Citations (Scopus)


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
Issue number2
Publication statusPublished - 2011 Feb


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

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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