TY - JOUR
T1 - Orbital ordering of intermediate-spin state of Co3+ in Sr 3YCo4O10.5
AU - Nakao, Hironori
AU - Murata, Tetsuya
AU - Bizen, Daisuke
AU - Murakami, Youichi
AU - Ohoyama, Kenji
AU - Yamada, Kazuyoshi
AU - Ishiwata, Shintaro
AU - Kobayashi, Wataru
AU - Terasaki, Ichiro
PY - 2011/2
Y1 - 2011/2
N2 - 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.
AB - 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.
KW - Co intermediate spin-state
KW - Orbital ordering
KW - Resonant X-ray scattering
KW - Spin-state ordering
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U2 - 10.1143/JPSJ.80.023711
DO - 10.1143/JPSJ.80.023711
M3 - Article
AN - SCOPUS:79951621785
SN - 0031-9015
VL - 80
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
IS - 2
M1 - 023711
ER -