ANSTO Publications Online: Direct observation of charge order and an orbital glass state in multiferroic LuFe2O4.

Please use this identifier to cite or link to this item: http://apo.ansto.gov.au/dspace/handle/10238/1831

Title:	Direct observation of charge order and an orbital glass state in multiferroic LuFe2O4.
Authors:	Mulders, AM Lawrence, SM Staub, U Garcia-Fernandez, M Scagnoli, V Mazzoli, C Pomjakushina, E Conder, K Wang, YD
Keywords:	Ferroelectric Materials Iron Lutetium Spin Glass State X-Ray Diffraction Scattering
Issue Date:	14-Aug-2009
Publisher:	American Physical Society
Citation:	Mulders, A. M., Lawrence, S. M., Staub, U., Garcia-Fernandez, M., Scagnoli, V., Mazzoli, C., et al. (2009). Direct observation of charge order and an orbital glass state in multiferroic LuFe2O4. Physical Review Letters, 103(7), 4.
Abstract:	Geometrical frustration of the Fe ions in LuFe2O4 leads to intricate charge and magnetic order and a strong magnetoelectric coupling. Using resonant x-ray diffraction at the Fe K edge, the anomalous scattering factors of both Fe sites are deduced from the (h/3 k/3 l/2) reflections. The chemical shift between the two types of Fe ions equals 4.0(1) eV corresponding to full charge separation into Fe2+ and Fe3+. The polarization and azimuthal angle dependence of the superlattice reflections demonstrate the absence of differences in anisotropic scattering revealing random orientations of the Fe2+ orbitals characteristic of an orbital glass state. © 2009, American Physical Society
URI:	http://dx.doi.org/10.1103/PhysRevLett.103.077602 http://apo.ansto.gov.au/dspace/handle/10238/1831
ISSN:	0031-9007
Appears in Collections:	Journal Articles

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