Charge order, enhanced orbital moment, and absence of magnetic frustration in layered multiferroic LuFe2O4
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Publication date
2009-12
Authors
Kuepper, K.
Raekers, M.
Taubitz, C.
Prinz, M.
Derks, C.
Neumann, M.
Postnikov, A. V.
de Groot, Frank
Piamonteze, C.
Prabhakaran, D.
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Article
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Abstract
Electronic and magnetic properties of the charge ordered phase of LuFe2O4 are investigated by means of x-ray spectroscopic and theoretical electronic structure approaches. LuFe2O4 is a compound showing fascinating magnetoelectric coupling via charge ordering. Here, we identify the spin ground state of LuFe2O4 in the charge ordered phase to be a 2:1 ferrimagnetic configuration, ruling out a frustrated magnetic state. An enhanced orbital moment may enhance the magnetoelectric coupling. Furthermore, we determine the densities of states and the corresponding correlation potentials by means of x-ray photoelectron and emission spectroscopies, as well as electronic structure calculations.
Keywords
band structure, charge-ordered states, electronic density of states, ferrimagnetic materials, ferroelectric materials, ground states, lutetium compounds, magnetic moments, magnetoelectric effects, multiferroics, X-ray emission spectra, X-ray photoelectron spectra, SINGLE-CRYSTAL, SYSTEM LUFE2O4, FERROELECTRICITY, TRANSITION, OXIDES
Citation
Kuepper, K, Raekers, M, Taubitz, C, Prinz, M, Derks, C, Neumann, M, Postnikov, A V, de Groot, F M F, Piamonteze, C, Prabhakaran, D & Blundell, S J 2009, 'Charge order, enhanced orbital moment, and absence of magnetic frustration in layered multiferroic LuFe2O4', Physical Review B - Condensed Matter and Materials Physics, vol. 80, no. 22, 220409, pp. 220409/1-220409/4. https://doi.org/10.1103/PhysRevB.80.220409