Bulk magnetoelectricity in the hexagonal manganites and ferrites

Hena Das, Aleksander L. Wysocki, Yanan Geng, Weida Wu, Craig J. Fennie

Research output: Contribution to journalArticlepeer-review

170 Scopus citations

Abstract

Improper ferroelectricity (trimerization) in the hexagonal manganites RMnO 3 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 RMnO 3 under large magnetic field. We suggest a family of materials, the hexagonal RFeO 3 ferrites, also display the predicted phenomena in their ground state.

Original languageEnglish (US)
Article number2998
JournalNature communications
Volume5
DOIs
StatePublished - Jan 6 2014

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • General Biochemistry, Genetics and Molecular Biology
  • General Physics and Astronomy

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