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Structural, optical and thermal properties of Zr–Fe co‐doped congruent LiNbO 3 single crystals
Author(s) -
Riscob B.,
Bhatt R.,
Vijayan N.,
Bhaumik Indranil,
Ganesamoorthy S.,
Wahab M. A.,
Bhagavannarayana G.
Publication year - 2013
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889813005797
Subject(s) - dopant , birefringence , materials science , doping , diffraction , analytical chemistry (journal) , single crystal , crystal (programming language) , lattice constant , lithium niobate , crystallography , crystal structure , powder diffraction , optics , mineralogy , chemistry , optoelectronics , programming language , physics , chromatography , computer science
Zr–Fe‐doped congruent lithium niobate single crystals were grown by the Czochralski technique. The crystal structure and lattice parameter of the grown crystals were assessed by powder X‐ray diffraction and the strain developed as a result of doping has been calculated (−1.19 × 10 −3 ) by using the Williamson–Hall relation. The incorporated dopant concentration along with the dopant distribution in the specimen crystal was estimated by X‐ray florescence spectrometry. A multi‐crystal X‐ray diffraction analysis was carried out to identify the crystalline perfection of the sample and revealed that the investigated crystal does not contain any structural grain boundaries but does contain point defects and micrometre size mosaic blocks. Birefringence measurements were carried out using a prism coupler spectrometer and found that the optical birefringence is 0.0822 for 532 nm and 0.705 for 1064 nm. A thermal conductivity (κ) study reveals that the doped sample has a lower κ value than the undoped equivalent.