This article is cited in 1 paper

Impurity centers

Electron paramagnetic resonance of Gd$^{3+}$ ions in Ca$_{1-x-y}$Y$_x$Gd$_y$F$_{2+x +y}$ crystals

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: Electron paramagnetic resonance of Ca$_{1-x-y}$Y$_x$Gd$_y$F$_{2+x +y}$ single crystals has revealed spectra that are not typical of gadolinium-doped CaF$_2$ crystals. These spectra have a nearly tetragonal symmetry and are most probably caused by Gd$^{3+}$ ions localized in yttrium clusters. Weak spectra of tetragonal Gd$^{3+}$ centers, whose parameters are close to those of a cubic gadolinium center caused by an isolated Gd$^{3+}$ ion, have been also detected. These centers are attributed to isolated Gd$^{3+}$ ions localized near octahedral rare-earth clusters or their associations.

Received: 22.11.2012

 English version: Physics of the Solid State, 2013, 55:6, 1214–1219

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