1. North-Caucasus Federal University,The Scientific-Research Laboratory of Ceramics and Technochemistry, Scientific-Laboratory Complex of Clean Rooms, Physics and Technology Faculty,Stavropol,Russian Federation
2. North-Caucasus Federal University,Institute of Engineering,Stavropol,Russian Federation
3. The Southern Scientific Centre of the Russian Academy of Sciences,Laboratory of Physics and Technology of Semiconductor Nanoheterostructures for Microwave Electronics and Photonics Federal Research Center,Rostov-on-Don,Russian Federation
4. North-Caucasus Federal University,The Scientific-Research Laboratory of Physical and Chemical Methods of Analysis,Stavropol,Russian Federation