Abstract
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 I4/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 3.5μB at 10 K, and the directions of the nearest-neighbor Co moments are orthogonal each other in the c plane.
Original language | English |
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Pages (from-to) | 18020-18022 |
Number of pages | 3 |
Journal | Journal of the American Chemical Society |
Volume | 132 |
Issue number | 51 |
DOIs | |
Publication status | Published - 2010 Dec 29 |
ASJC Scopus subject areas
- Catalysis
- Chemistry(all)
- Biochemistry
- Colloid and Surface Chemistry