Gnezdilov, V. P.Lamonova, K. V.Pashkevich, Yu. G.Lemmens, P.Berger, H.Bussy, F.Gnatchenko, S. L.2011-12-162011-12-162011-12-16201010.1063/1.3455808https://infoscience.epfl.ch/handle/20.500.14299/75336WOS:000280144200009sublattices ferrimagnet Cu2OSeO3 with a cubic symmetry and a linear magnetoelectric effect. There is no spectroscopic evidence for structural lattice distortions below T-C=60 K, which are expected due to magnetoelectric coupling. Using symmetry arguments we explain this observation by considering a special type of ferrimagnetic ground state which does not generate a spontaneous electric polarization. Interestingly, Raman scattering shows a strong increase of electric polarization of media through a dynamic magnetoelectric effect as a remarkable enhancement of the scattering intensity below T-C. New lines of purely magnetic origin have been detected in the magnetically ordered state. A part of them are attributed as scattering on exchange magnons. Using this observation and further symmetry considerations we argue for strong Dzyaloshinskii-Moriya interaction existing in the Cu2OSeO3. (c) 2010 American Institute of Physics. [doi:10.1063/1.3455808]Light-ScatteringAntiferromagnetsCu2Seo4Magnetoelectricity in the ferrimagnetic Cu2OSeO3: symmetry analysis and Raman scattering studytext::journal::journal article::research article