Journal
LOW TEMPERATURE PHYSICS
Volume 33, Issue 8, Pages 715-717Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2770660
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The interaction of light with electromagnons in a sinusoidally modulated antiferromagnetic phase of TbMnO3 is examined. It is predicted that the frequency dependence of the dielectric tensor epsilon(zz) changes substantially at the transition from a sinusoidal into a spiral magnetic phase with spontaneous electric polarization. The phason mode of such a transition is an electromagnon mode in which the magnetoelectric phase is due to modulation of the magnetic structure. (c) 2007 American Institute of Physics.
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