Charge Order, Dynamics, and Magnetostructural Transition in Multiferroic LuFe2O4

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
Phys. Rev. Lett. 101, 227602 – Published 26 November 2008

Abstract

We investigated the series of temperature and field-driven transitions in LuFe2O4 by optical and Mössbauer spectroscopies, magnetization, and x-ray scattering in order to understand the interplay between charge, structure, and magnetism in this multiferroic material. We demonstrate that charge fluctuation has an onset well below the charge ordering transition, supporting the “order by fluctuation” mechanism for the development of charge order superstructure. Bragg splitting and large magneto-optical contrast suggest a low-temperature monoclinic distortion that can be driven by both temperature and magnetic field.

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  • Received 16 September 2008

DOI:https://doi.org/10.1103/PhysRevLett.101.227602

©2008 American Physical Society

Authors & Affiliations

X. S. Xu1, M. Angst2,3, T. V. Brinzari1, R. P. Hermann3,4, J. L. Musfeldt1, A. D. Christianson2, D. Mandrus2,5, B. C. Sales2, S. McGill6, J.-W. Kim7, and Z. Islam8

  • 1Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, USA
  • 2Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
  • 3Institut für Festkörperforschung, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany
  • 4Department of Physics, B5, Université de Liège, B-4000 Sart-Tilman, Belgium
  • 5Department of Physics, University of Tennessee, Knoxville, Tennessee 37996, USA
  • 6National High Magnetic Field Laboratory, Tallahassee, Florida, 32310, USA
  • 7Ames Laboratory, Ames, Iowa 50010, USA
  • 8Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA

See Also

Charge Order in LuFe2O4: Antiferroelectric Ground State and Coupling to Magnetism

M. Angst, R. P. Hermann, A. D. Christianson, M. D. Lumsden, C. Lee, M.-H. Whangbo, J.-W. Kim, P. J. Ryan, S. E. Nagler, W. Tian, R. Jin, B. C. Sales, and D. Mandrus
Phys. Rev. Lett. 101, 227601 (2008)

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Vol. 101, Iss. 22 — 28 November 2008

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