1. Laboratory of Technologies of Polymer Ferroelectrics, Bauman Moscow State Technical University, Moscow 141005, Russia
2. Laboratory of Physics of Oxide Ferroelectrics, Department of Materials Science of Semiconductors and Dielectrics, National University of Science and Technology MISIS, Moscow 119049, Russia
3. A.N. Nesmeyanov Institute of Organoelement Compounds RAS, Moscow 119049, Russia
4. A.N. Frumkin Institute of Physical Chemistry and Electrochemistry RAS, Moscow 119071, Russia
5. Laboratory of Coordination Chemistry of Alkali and Rare Metals, N.S. Kurnakov Institute of General and In-Organic Chemistry RAS, Moscow 119991, Russia