1. The Smart Materials Research Institute Southern Federal University A. Sladkova str. 178/24 Rostov‐on‐Don 344090 Russia
2. Research Institute of Physics Southern Federal University Stachki ave. 194 Rostov‐on‐Don 344090 Russia
3. Physics Faculty Southern Federal University Sorge str. 5 Rostov‐on‐Don 344090 Russia
4. Institute of Earth Sciences Southern Federal University Sorge str. 40 Rostov‐on‐Don 344090 Russia