1. Charge order in LuFe2O4: an unlikely route to ferroelectricity
- Author
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de Groot, J., Mueller, T., Rosenberg, R. A., Keavney, D. J., Islam, Z., Kim, J. -W., and Angst, M.
- Subjects
Condensed Matter - Strongly Correlated Electrons - Abstract
We present the refinement of the crystal structure of charge-ordered LuFe2O4, based on single-crystal x-ray diffraction data. The arrangement of the different Fe-valence states, determined with bond-valence-sum analysis, corresponds to a stacking of charged Fe bilayers, in contrast to the polar bilayers previously suggested. This arrangement is supported by an analysis of x-ray magnetic circular dichroism spectra, which also evidences a strong charge-spin coupling. The non-polar bilayers are inconsistent with charge order based ferroelectricity., Comment: 5 pages, 3 figures
- Published
- 2011
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