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

22 Citations (Scopus)

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 languageEnglish
Pages (from-to)18020-18022
Number of pages3
JournalJournal of the American Chemical Society
Volume132
Issue number51
DOIs
Publication statusPublished - 2010 Dec 29

ASJC Scopus subject areas

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

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