Тип публикации: статья из журнала
Год издания: 2010
Идентификатор DOI: 10.1134/S1063783410110314
Аннотация: The Jahn-Teller effect in the ZnGa2O4 spinel single crystal has been investigated using electron paramagnetic resonance of Cu2+ ions in the temperature range 110-560 K. It has been shown that copper ions occupy octahedral sites 16d in the ZnGa2O4 crystal with cubic symmetry Oh7 (Fd-3m). At T 560 K, the octahedra undergo tetragonalПоказать полностьюdistortions (predominantly tension) and rotation around the fourfold axes by the angle ? ? 2. 6°. The parameters of the spin Hamiltonian, which characterize the prolate (g{norm of matrix} = 2.355, g? = 2.077, A{norm of matrix} = 116 Oe, Atp = 12 Oe) and oblate (g{norm of matrix} = 2.018, g? = 2.246, A{norm of matrix} = 75 Oe, A? = 44 Oe) octahedra, have been determined. At temperatures above 560 K, the static Jahn-Teller effect transforms into the dynamic effect and the spectrum of the magnetic resonance becomes isotropic with g = 2.116 (the experimental frequency corresponds to the X band). © 2010 Pleiades Publishing, Ltd.
Журнал: Physics of the Solid State
Выпуск журнала: Т. 52, № 11
Номера страниц: 2415-2418
ISSN журнала: 10637834
Место издания: Санкт-Петербург
Издатель: Pleiades Publishing, Ltd. (Плеадес Паблишинг, Лтд)