title: Low frequency excitations in multiferroic MnWO4.
abstract: Dynamic anomalies have been found in the magnetically ordered phases of multiferroic MnWO(4) using polarized Raman scattering. Strong phonon damping is observed for several B(g) modes within the ferroelectric phase and has been attributed to spin-phonon interactions. Moreover, a new low frequency excitation was detected near 33 cm(-1) that grows in intensity on cooling into the antiferromagnetic phases. It is argued that this signal is most probably due to a two-magnon process.
authors: Institut für Physikalische Chemie, Georg-August-Universität Göttingen, Tammannstrasse 6, D-37077 Göttingen, Germany.
authors: L
authors: L
authors: Dura
authors: H
authors: H
authors: Gibhardt
authors: J
authors: J
authors: Leist
authors: P
authors: P
authors: Becker
authors: L
authors: L
authors: Bohatý
authors: G
authors: G
authors: Eckold