Charge order, enhanced orbital moment, and absence of magnetic frustration in layered multiferroic LuFe2O4
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) Physical review. B, Condensed matter and materials physics, volume 80, issue 22, pp. 220409/1 - 220409/4
(Article)
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
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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.
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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
ISSN: 1098-0121
Publisher: American Physical Society
(Peer reviewed)
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