Journal
JOURNAL OF CRYSTAL GROWTH
Volume 291, Issue 2, Pages 390-397Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jcrysgro.2006.03.022
Keywords
crystal structure; doping; point defects; single crystals growth; niobates; ferroelectric materials
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A series of lithium niobate LiNbO3 (LN) single crystals doped by rare-earth elements (Tm, Er, Dy, Tb, Gd, Pr) were grown under the same conditions by the Czochralski technique in a wide range of dopant concentrations. The distribution coefficients of rare-earth elements in the crystal-melt system of LN were determined at the beginning of the crystal growth. Their dependence on the dopant concentration in melt ranging from 0.1 to 3.5 wt% was investigated. Concentration dependences of physicochemical, ferroelectric and structural characteristics of doped LN single crystals were studied using X-ray diffraction, thermal analysis and Raman scattering measurements. A mechanism of rare-earth elements incorporation into the crystal lattice of LN was proposed for a wide range of dopant concentrations. (c) 2006 Elsevier B.V. All rights reserved.
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