High-frequency electromagnon in GdMnO<Subscript>3</Subscript>

Results of far-infrared transmittance are reported for GdMnO<Subscript>3</Subscript>, a multiferroic perovskite manganite. The spectra allow to obtain position and intensity of the high-frequency electromagnon (~75 cm<Superscript>-1</Superscript>) in this material. We present a comparative analysis of the high- and low-frequency electromagnons across the phase diagram of GdMnO<Subscript>3</Subscript>. The traces of the electromagnon excitation can be detected even deeply in the paramagnetic state, which is attributed to magnetic fluctuations. Copyright EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2011