Magnetic properties of the magnetoelectric compound Cu2OSeO3: Magnetization and 77Se NMR study
conference contributionposted on 09.08.2018 by M. Belesi, T. Philippe, Ioannis Rousochatzakis, H.C. Wu, H. Berger, S. Granville, I.V. Shvets, J.P. Ansermet
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We present magnetization and77Se Nuclear Magnetic Resonance (NMR) measurements in single crystals of the magneteoelectric compound Cu2OSeO3. The temperature and field dependence of the magnetization suggest a ferrimagnetic ordering at Tc≃ 60 K in a 3up-1down configuration. The easy axis of the magnetization is along the  crystallographic direction. The77Se NMR line shape data collected at 14.09 T are consistent with the symmetries imposed by the cubic P213 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)].
H. B. acknowledges financial support from the Swiss NSF and by the NCCR MaNEP.