Abstract
The study of grown Sc2SiO5 : Gd and Sc2SiO5 : Fe crystals was carried out by the paramagnetic resonance method. It has been established that Fe3+ ions replace Sc3+ in both crystallographic positions, while Gd3+ ions exhibit a single center localized in a larger position with a coordination number of 7. Measurement of the orientational behavior of the positions of transitions of Fe3+ and Gd3+ centers in two orthogonal planes made it possible to determine the parameters of their triclinic spin Hamiltonians. To determine the localization of impurity ions Cr3+, Fe3+ and Gd3+ in scandium and yttrium silicates, the orientation of the main Z axes of the fine structure tensors of the second rank was used. Keywords: scandium and yttrium silicates, impurity ions, paramagnetic resonance.
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