This article is cited in 5 papers

Impurity centers

Trigonal and triclinic Fe$^{3+}$ paramagnetic centers in ferroelectric Pb$_5$Ge$_3$O$_{11}$

V. A. Vazhenin, A. P. Potapov, A. V. Fokin, M. Yu. Artemov

Ural Federal University Scientific Research Institute of Physics and Applied Mathematics, Ekaterinburg

Abstract: In the EPR spectra of iron-doped lead germanate single crystals, triclinic Fe$^{3+}$ paramagnetic centers have been found in addition to trigonal centers. Their contribution increases upon annealing in a chlorine-containing atmosphere. The parameters of the spin Hamiltonian of three triclinic centers assigned to Fe$^{3+}$–Cl$^-$ dimeric complexes have been determined. The localization of iron and chlorine ions in Pb$_5$Ge$_3$O$_{11}$ has been discussed.

Received: 04.05.2012

 English version: Physics of the Solid State, 2012, 54:12, 2450–2455

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