Oxygen Moment Formation and Canting in Li2CuO2

E. M. L. Chung; G. J. McIntyre; D. McK. Paul; G. Balakrishnan; M. R. Lees

doi:10.1103/PhysRevB.68.144410

Oxygen Moment Formation and Canting in Li2CuO2

Strongly Correlated Electrons 2009-11-10 v1

Authors: E. M. L. Chung , G. J. McIntyre , D. McK. Paul , G. Balakrishnan , M. R. Lees

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Abstract

The possibilities of oxygen moment formation and canting in the quasi-1D cuprate Li2CuO2 are investigated using single crystal neutron diffraction at 2 K. The observed magnetic intensities could not be explained without the inclusion of a large ordered oxygen moment of 0.11(1) Bohr magnetons. Least-squares refinement of the magnetic structure of Li2CuO2 in combination with a spin-density Patterson analysis shows that the magnetization densities of the Cu and O atoms are highly aspherical, forming quasi-1D ribbons of localised Cu and O moments. Magnetic structure refinements and low-field magnetization measurements both suggest that the magnetic structure of Li2CuO2 at 2 K may be canted. A possible model for the canted configuration is proposed.

Keywords

phase transitions frustrated magnetism

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@article{arxiv.cond-mat/0308209,
  title  = {Oxygen Moment Formation and Canting in Li2CuO2},
  author = {E. M. L. Chung and G. J. McIntyre and D. McK. Paul and G. Balakrishnan and M. R. Lees},
  journal= {arXiv preprint arXiv:cond-mat/0308209},
  year   = {2009}
}

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10 pages, 8 figures (screen resolution)

Oxygen Moment Formation and Canting in Li2CuO2

Abstract

Keywords

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