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Growth of near‐stoichiometric LiNbO3 crystals and Li2O contents determination
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AbstractTwo kinds of near‐stoichiometric LiNbO3 crystals (SLN11 and SLN19) were grown by a flux pulling method from stoichiometric melt with addition of 11mol%K2O and 19mol%K2O, respectively. Compared with the congruent melting LiNbO3, the ultraviolet absorption edges of two crystals shift towards shorter wavelengths, and the locations of the OH‐ infrared absorption band have obvious change and the bandwidths become greatly narrower. From these experimental results, the Li2O contents are determined indirectly to be about 49.6mol% for SLN11 and 49.9mol% for SLN19, respectively. The Li2O content in SLN19 is very close to the ideal value of 50mol%. The coercive fields of two crystals were measured by the poling method at room temperature. A linear relationship between the Li2O content and the coercive field was fitted. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Title: Growth of near‐stoichiometric LiNbO3 crystals and Li2O contents determination
Description:
AbstractTwo kinds of near‐stoichiometric LiNbO3 crystals (SLN11 and SLN19) were grown by a flux pulling method from stoichiometric melt with addition of 11mol%K2O and 19mol%K2O, respectively.
Compared with the congruent melting LiNbO3, the ultraviolet absorption edges of two crystals shift towards shorter wavelengths, and the locations of the OH‐ infrared absorption band have obvious change and the bandwidths become greatly narrower.
From these experimental results, the Li2O contents are determined indirectly to be about 49.
6mol% for SLN11 and 49.
9mol% for SLN19, respectively.
The Li2O content in SLN19 is very close to the ideal value of 50mol%.
The coercive fields of two crystals were measured by the poling method at room temperature.
A linear relationship between the Li2O content and the coercive field was fitted.
(© 2004 WILEY‐VCH Verlag GmbH & Co.
KGaA, Weinheim).
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