Belesi, M.Philippe, T.Rousochatzakis, I.Wu, H. C.Berger, H.Granville, S.Shvets, I. V.Ansermet, J.-Ph2012-03-092012-03-092012-03-09201110.1088/1742-6596/303/1/012069https://infoscience.epfl.ch/handle/20.500.14299/78562WOS:000299084800069We present magnetization and Se-77 Nuclear Magnetic Resonance (NMR) measurements in single crystals of the magnetoelectric compound Cu2OSeO3. The temperature and field dependence of the magnetization suggest a ferrimagnetic ordering at T-c similar or equal to 60 K in a 3up-1down configuration. The easy axis of the magnetization is along the [100] crystallographic direction. The Se-77 NMR line shape data collected at 14.09 T are consistent with the symmetries imposed by the cubic P2(1)3 space group in the temperature range 20-290 K and confirm that the magnetic transition is not accompanied by any lowering of the crystal symmetry as has recently been proposed by Bos et al. [Phys. Rev. B 78 094416 (2008)].enPolarizationtext::conference output::conference proceedings::conference paper