Phys. Rev. Lett. 101, 227601 (2008) [4 pages]Charge Order in LuFe2O4: Antiferroelectric Ground State and Coupling to MagnetismReceived 22 July 2008; published 26 November 2008 X-ray scattering by multiferroic LuFe2O4 is reported. Below 320 K, superstructure reflections indicate an incommensurate charge order with propagation close to (1/31/33/2). The corresponding charge configuration, also found by electronic structure calculations as most stable, contains polar Fe/O double layers with antiferroelectric stacking. Diffuse scattering at 360 K, with (1/31/30) propagation, indicates ferroelectric short-range correlations between neighboring double layers. The temperature dependence of the incommensuration indicates that charge order and magnetism are coupled. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.101.227601
DOI:
10.1103/PhysRevLett.101.227601
PACS:
77.80.−e, 61.05.C−, 71.30.+h, 75.80.+q
See AlsoSee Also: X. S. Xu, M. Angst, T. V. Brinzari, R. P. Hermann, J. L. Musfeldt, A. D. Christianson, D. Mandrus, B. C. Sales, S. McGill, J.-W. Kim, and Z. Islam, Charge Order, Dynamics, and Magnetostructural Transition in Multiferroic LuFe2O4, Phys. Rev. Lett. 101, 227602 (2008). |
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