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001     21209
005     20250129094242.0
024 7 _ |2 DOI
|a 10.1103/PhysRevLett.108.187601
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|a 2128/7471
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|a Physics, Multidisciplinary
100 1 _ |0 P:(DE-Juel1)VDB73938
|a de Groot, J.
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|u FZJ
245 _ _ |a Charge Order in LuFe2O4: An Unlikely Route to Ferroelectricity
260 _ _ |a College Park, Md.
|b APS
|c 2012
300 _ _ |a 187601
336 7 _ |a Journal Article
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440 _ 0 |0 4925
|a Physical Review Letters
|v 108
|x 0031-9007
|y 18
500 _ _ |a We gratefully acknowledge D. Robinson for help with collecting data. Support from the initiative and networking fund of the Helmholtz Association of German Research Centers by funding the Helmholz-University Young Investigator Group "Complex Ordering Phenomena in Multifunctional Oxides," is gratefully acknowledged. Use of the Advance Photon Source was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357. M. A. thanks D. Mandrus, B. C. Sales, W. Tian, and R. Jin for their assistance in crystal growth, also supported by the U.S. DOE.
520 _ _ |a 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 with 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 nonpolar bilayers are inconsistent with charge order based ferroelectricity.
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|a Angst, M.
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856 7 _ |u http://dx.doi.org/10.1103/PhysRevLett.108.187601
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