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Please use this identifier to cite or link to this item: http://apo.ansto.gov.au/dspace/handle/10238/5579

Title: Electromagnon and phonon excitations in multiferroic TbMnO3
Authors: Rovillain, P
Liu, J
Cazayous, M
Gallais, Y
Measson, M A
Sakata, H
Sacuto, A
Keywords: RAMAN SPECTROSCOPY
CRYSTALS
CRYSTALLOGRAPHY
PHONONS
SPIN
TEMPERATURE DEPENDENCE
Issue Date: 30-Jul-2012
Publisher: AMERICAN PHYSICAL SOCIETY
Citation: Rovillain, P., Liu, J., Cazayous, M., Gallais, Y., Measson, M. A., Sakata, H., & Sacuto, A. (2012). Electromagnon and phonon excitations in multiferroic TbMnO3. Physical Review B, 86, Article Number 014437.
Abstract: We have performed Raman measurements on a TbMnO3 single crystal under magnetic field along the three crystallographic directions. The flip of the spin spiral plane creates an electromagnon excitation. In addition to the electromagnons induced by the Heisenberg coupling, we have detected the electromagnon created by the Dzyaloshinskii-Moriya interaction along the c axis. We have identified all the vibrational modes of TbMnO3. Their temperature dependencies show that only one phonon observed along the polarization axis is sensitive to the ferroelectric transition. This mode is tied to the Tb3+ ion displacements that contribute to the ferroelectric polarization. © 2012, American Physical Society.
URI: http://dx.doi.org/10.1103/PhysRevB.86.014437
http://apo.ansto.gov.au/dspace/handle/10238/5579
ISSN: 1098-0121
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