Evidence for Electroactive Excitation of the Spin Cycloid in
- 1 March 2010
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 104 (9), 097202
- https://doi.org/10.1103/physrevlett.104.097202
Abstract
Terahertz electromagnetic excitations in the multiferroic single crystals are investigated across the magnetic field induced rotation of the magnetic spin cycloid. In addition to the electromagnon along the axis, the detailed polarization analysis of the experimental spectra suggests the existence of an electroactive excitation for electric fields of the electromagnetic wave along the crystallographic axis. This excitation is possibly the electroactive eigenmode of the spin-cycloid in , which has been predicted within the inverse Dzyaloshinskii-Moriya mechanism of magnetoelectric coupling. DOI: http://dx.doi.org/10.1103/PhysRevLett.104.097202 © 2010 The American Physical Society
Keywords
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