Orthogonal spin arrangement in quasi-two-dimensional La2Co 2O3Se2

Yayoi Fuwa, Takashi Endo, Makoto Wakeshima, Yukio Hinatsu, Kenji Ohoyama

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)


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 languageEnglish
Pages (from-to)18020-18022
Number of pages3
JournalJournal of the American Chemical Society
Issue number51
Publication statusPublished - 2010 Dec 29

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry


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