Abstract.
LiNbO3:Zn single crystals and powders were studied by precise X-ray 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 LiNbO3:Zn 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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Received: 17 November 2000 / Revised version: 23 January 2001 / Published online: 20 April 2001
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Volk, T., Maximov, B., Chernaya, T. et al. Photorefractive properties of LiNbO3:Zn crystals related to the defect structure . Appl Phys B 72, 647–652 (2001). https://doi.org/10.1007/s003400100548
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DOI: https://doi.org/10.1007/s003400100548