EPR study of the Jahn-Teller effect of Cu2+ ions in ZnGa2O4

Описание

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.

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Издание

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)

Авторы

  • Vorotynov A.M. (Kirensky Institute of Physics, Siberian Branch,Russian Academy of Sciences)
  • Petrakovskii G.A. (Kirensky Institute of Physics, Siberian Branch,Russian Academy of Sciences)
  • Sablina K.A. (Kirensky Institute of Physics, Siberian Branch,Russian Academy of Sciences)
  • Bovina A.F. (Kirensky Institute of Physics, Siberian Branch,Russian Academy of Sciences)
  • Vasil'ev A.D. (Kirensky Institute of Physics, Siberian Branch,Russian Academy of Sciences)

Вхождение в базы данных

  • eLIBRARY.RU (цитирований 5)
  • Web of Science
  • Scopus