TY JOUR TI The mechanism of magnitooptic activity of the rе-ion thulium-ittrium of garnet-aluminat tm3+:yag KW rare earth ion KW thulium-yttrium garnet aluminate KW crystalline field KW multiplets KW magnetic circular polarization of iuminescence KW Stark sub-levels JO Actual directions of scientific researches of the XXI century: theory and practice AU Mukhammadiev, A.. AU Zhuraeva, N.. AU Normurodov, E.. PY 2014 IS 2 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov