2010年12月
Orthogonal Spin Arrangement in Quasi-Two-Dimensional La2Co2O3Se2
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
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- 巻
- 132
- 号
- 51
- 開始ページ
- 18020
- 終了ページ
- 18022
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1021/ja109007g
- 出版者・発行元
- AMER CHEMICAL SOC
The crystal, electronic, and magnetic structures of the cobalt oxyselenide La2Co2O3Se2 were investigated through powder neutron diffraction measurements and band structure calculations. This oxyselenide crystallizes in a tetragonal layered structure with space group 14/mmm. The Co ion is sixfold-coordinated by two oxide ions and four selenide ions, and the face-sharing CoO2Se4 octahedra form Co2OSe2 layers. The band structure calculations revealed that the Co ion is in the divalent high-spin state. Rietveld analysis of the neutron diffraction profiles below 200 K demonstrated that the Co moments have a noncollinear antiferromagnetic structure with the propagation vector k = (1/2, 1/2, 0). The ordered magnetic moment was determined to be 3.5 mu(B) at 10 K, and the directions of the nearest-neighbor Co moments are orthogonal each other in the c plane.
- リンク情報
- ID情報
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- DOI : 10.1021/ja109007g
- ISSN : 0002-7863
- Web of Science ID : WOS:000285818700014