1. Clarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, UK
2. Chair of Magnetofluiddynamics, Measuring and Automation Technology, Institute of Mechatronic Engineering, TU Dresden, Dresden 01069, Germany
3. Institute of Continuous Media Mechanics, Russian Academy of Sciences, Ural Branch, Perm, 614018, Russia
4. Institute of Natural Science and Mathematics, Ural Federal University, Ekaterinburg, 620081, Russia