Open AccessШирокополосная ЭПР-спектроскопия кристалла Y-=SUB=-3-=/SUB=-Al-=SUB=-5-=/SUB=-O-=SUB=-12-=/SUB=-:Ho-=SUP=-3+-=/SUP=-
Author(s) -
Г.Р. Асатрян,
Г.С. Шакуров,
А.Г. Петросян,
Д.Д. Крамущенко,
К.Л. Ованесян
Publication year - 2022
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2022.06.52396.296
Subject(s) - hyperfine structure , dodecahedron , ion , yttrium , impurity , excited state , multiplet , electron paramagnetic resonance , spectral line , atomic physics , paramagnetism , materials science , physics , chemistry , crystallography , nuclear magnetic resonance , condensed matter physics , quantum mechanics , astronomy , metallurgy , oxide
EPR spectra of Ho3+ impurity ions were recorded in single crystals of yttrium aluminum garnet (Y3Al5O12) in the frequency range of 114-170 GHz, at a temperature of 4.2 K. The measurement results indicate the substitution of Ho3+ ions for Y3+ ions in the dodecahedral position with D2 local symmetry. The magnitude of the g-factor, the hyperfine structure constant, and the energy interval between the main and the first excited nondegenerate sublevels of the main multiplet 5I8 are determined. Weak satellite signals have also been registered, the origin of which is associated with the formation of antisite defects in the environment of Ho3+ paramagnetic centers.