https://doi.org/10.1140/epjb/e2011-10691-3
High-frequency electromagnon in GdMnO3
1
Institute of Solid State Physics, Vienna University of
Technology, 1040 Vienna, Austria
2
Experimentalphysik V, EKM,
Universität Augsburg, 86135 Augsburg, Germany
3
General
Physics Institute, Russian Academy of Sciences, 119991 Moscow, Russia
Corresponding author: a andrei.pimenov@ifp.tuwien.ac.at
Received:
9
September
2010
Revised:
23
February
2011
Published online:
14
March
2011
Results of far-infrared transmittance are reported for GdMnO3, a multiferroic perovskite manganite. The spectra allow to obtain position and intensity of the high-frequency electromagnon (~75 cm-1) in this material. We present a comparative analysis of the high- and low-frequency electromagnons across the phase diagram of GdMnO3. The traces of the electromagnon excitation can be detected even deeply in the paramagnetic state, which is attributed to magnetic fluctuations.
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2011