This article is cited in 3 papers

Impurity centers

Electron paramagnetic resonance of Ce$^{3+}$ ions in lead thiogallate single crystals

G. R. Asatryan^a, V. V. Badikov^b, D. D. Kramushchenko^a, V. A. Khramtsov<sup>a

a</sup> Ioffe Institute, St. Petersburg
^b Kuban State University, Krasnodar

Abstract: The results of electron paramagnetic resonance (EPR) studies of Ce$^{3+}$ impurity ions in single crystals of lead thiogallate PbGa$_2$S$_4$ have been reported. The Ce$^{3+}$ ions substitute for Pb$^{2+}$ ions in the crystal lattice of PbGa$_2$S$_4$. A number of paramagnetic cerium centers in lead thiogallate have been observed. The spectra are described by the spin Hamiltonian of rhombic symmetry with the effective spin $S$ = 1/2. The $g$ factors of the main cerium centers have been determined. A large number of paramagnetic centers are due to both nonequivalent positions of lead and local charge compensation under the substitution Ce$^{3+}$ $\to$ Pb$^{2+}$.

Received: 28.03.2012

 English version: Physics of the Solid State, 2012, 54:10, 2057–2060

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