Affiliation: | 1. Institute of Solids and Semiconductor Physics, National Academy of Sciences of Belarus, P. Brovka str. 17, 220072, Minsk, Belarus 2. Laboratoire CRISMAT, ISMRA, 6 Boulevard du Maréchal Juin, 14050, Caen Cedex, France 3. Institute of Physics, Polish Academy of Sciences, Lotnikov str. 32/46, 02-668, Warsaw, Poland
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