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Bulk magnetoelectricity in the hexagonal manganites and ferrites

Author

Listed:
  • Hena Das

    (School of Applied and Engineering Physics, Cornell University, 224 Clark Hall, Ithaca, New York 14853, USA)

  • Aleksander L. Wysocki

    (School of Applied and Engineering Physics, Cornell University, 224 Clark Hall, Ithaca, New York 14853, USA)

  • Yanan Geng

    (Rutgers University)

  • Weida Wu

    (Rutgers University)

  • Craig J. Fennie

    (School of Applied and Engineering Physics, Cornell University, 224 Clark Hall, Ithaca, New York 14853, USA)

Abstract

Improper ferroelectricity (trimerization) in the hexagonal manganites RMnO3 leads to a network of coupled structural and magnetic vortices that induce domain wall magnetoelectricity and magnetization (M), neither of which, however, occurs in the bulk. Here we combine first-principles calculations, group-theoretic techniques and microscopic spin models to show how the trimerization not only induces a polarization (P) but also a bulk M and bulk magnetoelectric (ME) effect. This results in the existence of a bulk linear ME vortex structure or a bulk ME coupling such that if P reverses so does M. To measure the predicted ME vortex, we suggest RMnO3 under large magnetic field. We suggest a family of materials, the hexagonal RFeO3 ferrites, also display the predicted phenomena in their ground state.

Suggested Citation

  • Hena Das & Aleksander L. Wysocki & Yanan Geng & Weida Wu & Craig J. Fennie, 2014. "Bulk magnetoelectricity in the hexagonal manganites and ferrites," Nature Communications, Nature, vol. 5(1), pages 1-11, May.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms3998
    DOI: 10.1038/ncomms3998
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    Cited by:

    1. Kasper A. Hunnestad & Hena Das & Constantinos Hatzoglou & Megan Holtz & Charles M. Brooks & Antonius T. J. Helvoort & David A. Muller & Darrell G. Schlom & Julia A. Mundy & Dennis Meier, 2024. "3D oxygen vacancy distribution and defect-property relations in an oxide heterostructure," Nature Communications, Nature, vol. 15(1), pages 1-6, December.

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