Phonon anomalies in optical spectra of LnNbO3 single crystals-Reference-Cited by-同舟云学术

Phonon anomalies in optical spectra of LnNbO3 single crystals

Published:2004 Issue:6 Volume:69 Page:493-502
ISSN:0352-5139
Container-title:Journal of the Serbian Chemical Society
language:en
Short-container-title:JSCS

Author:

Golubovic Aleksandar¹,Gajic Rados²,Hinic Ivana¹,Valcic Andreja³

Affiliation:

1. Institute of Physics, Zemun

2. Institute of Physics, Zemun and Institute of Physics, Montanuniversitaet Leoben, Leoben, Austia

3. Faculty of Technology and Metallurgy, Belgrade, Serbia and Montenegro

Abstract

LiNbO3 single crystals were grown by the Czochralski technique in an air atmosphere. The critical crystal diameter Dc = 1.5 cm and the critical rate of rotation ?c=35 rpm were calculated by equations from the hydrodynamics of the melt. The domain inversion was carried out at 1430 K using a 3.75 V/cm electric field for 10 min. The obtained crystals were cut, polished and etched to determine the presence of dislocations and single domain structures. The optical properties were studied by infrared and Raman spectroscopy as a function of temperature. With decreasing temperature, an atypical behaviour of the phonon modes could be seen in the ferroelectrics LiNbO3. The obtained results are discussed and compared with published data.

Publisher

National Library of Serbia

Subject

General Chemistry

Reference15 articles.

1. The effect of an electrical field on the growth of lithium niobate single crystals

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5. High-repetition-rate femtosecond optical parametric oscillator based on periodically poled lithium niobate

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