1. Kyiv National Taras Shevchenko University; Volodymyrska str. 64 Kyiv Ukraine
2. Laboratory of Magnetic Resonance; Department of Physics, Faculty of Natural Sciences, Ben Gurion University of the Negev; P.O.Box. 653 8410501 Be'er-Sheva Israel
3. Institute for Metal Physics of the NAS of Ukraine; Vernadskiy Str. 36 Kyiv Ukraine