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Updated: Jun 25, 2026

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
Published on: August 15, 2018
Origin of electromagnon excitations in multiferroic RMnO3
R Valdés Aguilar1, M Mostovoy, A B Sushkov
1Department of Physics, University of Maryland, College Park, Maryland 20742, USA. rvaldes@physics.umd.edu
Abstract:
Electromagnon excitations in multiferroic orthorhombic RMnO3 are shown to result from the Heisenberg coupling between spins despite the fact that the static polarization arises from the much weaker Dzyaloshinskii-Moriya exchange interaction. We present a model incorporating the structural characteristics of this family of manganites that is confirmed by far infrared transmission data as a function of temperature and magnetic field and inelastic neutron scattering results. A deep connection is found between the magnetoelectric dynamics of the spiral phase and the static magnetoelectric coupling in the collinear E phase of this family of manganites.
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