Authors: T Volk B Maximov T Chernaya N Rubinina M Wöhlecke V Simonov
Publish Date: 2014/02/19
Volume: 72, Issue: 6, Pages: 647-652
Abstract
LiNbO3Zn single crystals and powders were studied by precise Xray diffraction methods Structural refinement yielded new models of the intrinsic defect structure valid for different Zn concentration ranges For concentrations up to 7 at in the crystal Zn ions incorporate onto Li sites at higher concentrations Zn ions are found on both Li and Nb sites Photorefractive properties of LiNbO3Zn are discussed in the context of the deduced defect models A smooth increase in the photoconductivity up to 7 at Zn is accounted for by a decrease of Nb antisites Steeper growth of the photoconductivity at higher Zn concentrations is related to vanishing Li vacancies
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