Authors
A. Platonenko
Institute of Solid State Physics, University of Latvia, Latvia
A. Akilbekov
L.N. Gumilyov Eurasian National University, Kazakhstan
J. Purans
Institute of Solid State Physics, University of Latvia, Latvia
V. Pankratov
Institute of Solid State Physics, University of Latvia, Latvia
Y. Suchikova
Berdyansk State Pedagogical University, Ukraine
A. I. Popov
L.N. Gumilyov Eurasian National University, Kazakhstan
Institute of Solid State Physics, University of Latvia, Latvia
Institute of Physics, University of Tartu, Estonia