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000021209 084__ $$2WoS$$aPhysics, Multidisciplinary
000021209 1001_ $$0P:(DE-Juel1)VDB73938$$ade Groot, J.$$b0$$uFZJ
000021209 245__ $$aCharge Order in LuFe2O4: An Unlikely Route to Ferroelectricity
000021209 260__ $$aCollege Park, Md.$$bAPS$$c2012
000021209 300__ $$a187601
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000021209 440_0 $$04925$$aPhysical Review Letters$$v108$$x0031-9007$$y18
000021209 500__ $$aWe gratefully acknowledge D. Robinson for help with collecting data. Support from the initiative and networking fund of the Helmholtz Association of German Research Centers by funding the Helmholz-University Young Investigator Group "Complex Ordering Phenomena in Multifunctional Oxides," is gratefully acknowledged. Use of the Advance Photon Source was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357. M. A. thanks D. Mandrus, B. C. Sales, W. Tian, and R. Jin for their assistance in crystal growth, also supported by the U.S. DOE.
000021209 520__ $$aWe 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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000021209 7001_ $$0P:(DE-Juel1)156453$$aMüller, T.$$b1$$uFZJ
000021209 7001_ $$0P:(DE-HGF)0$$aRosenberg, R. A.$$b2
000021209 7001_ $$0P:(DE-HGF)0$$aKeavney, D. J.$$b3
000021209 7001_ $$0P:(DE-HGF)0$$aIslam, Z.$$b4
000021209 7001_ $$0P:(DE-HGF)0$$aKim, J.-W.$$b5
000021209 7001_ $$0P:(DE-Juel1)130504$$aAngst, M.$$b6$$uFZJ
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