1. Institute for Molecules and Materials, Radboud University, 6525 AJ Nijmegen, The Netherlands
2. High Field Magnet Laboratory (HFML—EMFL), Radboud University, 6525 ED Nijmegen, The Netherlands
3. Kotelnikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences, 125009 Moscow, Russia
4. Prokhorov General Physics Institute of the Russian Academy of Sciences, 119991 Moscow, Russia
5. Moscow Institute of Physics and Technology (State University), 141700 Dolgoprudny, Russia