Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2003-08-11
Physics
Condensed Matter
Strongly Correlated Electrons
10 pages, 8 figures (screen resolution)
Scientific paper
10.1103/PhysRevB.68.144410
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.
Balakrishnan Ganesh
Chung E. M. L.
Lees Martin Richard
McIntyre Garry J.
Paul McK. D.
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