Magnetoelastic distortion of multiferroic BiFeO3 in the canted antiferromagnetic state

T. Room, J. Viirok, L. Peedu, U. Nagel, D. G. Farkas, D. Szaller, V. Kocsis, S. Bordács, I. Kezsmarki, D. L. Kamenskyi, H. Engelkamp, M. Ozerov, D. Smirnov, J. Krzystek, K. Thirunavukkuarasu, Y. Ozaki, Y. Tomioka, T. Ito, T. Datta, R. S. Fishman

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


Using THz spectroscopy, we show that the spin-wave spectrum of multiferroic BiFeO3 in its high-field canted antiferromagnetic state is well described by a spin model that violates rhombohedral symmetry. We demonstrate that the monoclinic distortion of the canted antiferromagnetic state is induced by the single-ion magnetoelastic coupling between the lattice and the two nearly antiparallel spins. The revised spin model for BiFeO3 contains two new single-ion anisotropy terms that violate rhombohedral symmetry and depend on the direction of the magnetic field.

Original languageEnglish (US)
Article number214410
JournalPhysical Review B
Issue number21
StatePublished - Dec 9 2020

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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