Comparative investigation of electrophysical characteristics of ceramic and single crystal LiNbO3

Electrophysical characteristics have been studied in ceramic and single crystal LiNbO3 of congruent and near-congruent composition. The comparative study has been carried out in a wide temperature range (290-800 K). Dispersion of the real part of the dielectric constant ε′ has been considered. Tempe...

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Bibliographic Details
Published in:Journal of physics. Conference series 2020-10, Vol.1658 (1)
Main Authors: Efremov, V V, Shcherbina, O B, Palatnikov, M N, Masloboeva, S M
Format: Article
Language:English
Subjects:
Ceramics
Comparative studies
Current carriers
Data analysis
Enthalpy
High temperature
Lithium niobates
Physics
Single crystals
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Summary:Electrophysical characteristics have been studied in ceramic and single crystal LiNbO3 of congruent and near-congruent composition. The comparative study has been carried out in a wide temperature range (290-800 K). Dispersion of the real part of the dielectric constant ε′ has been considered. Temperature dependences ε′(T) and σ(T) have been obtained and value of static conductivity has been determined in ceramic and single crystal LiNbO3 in the given temperature range. Temperature dependences of specific static conductivity σdc have been obtained due to impedance spectroscopy data analysis. Ceramic LN conductivity has been shown to be much higher in the whole studied temperature range. Charge carriers activation enthalpy in high-temperature area (above 420 K) is Ha = 0.88 eV for ceramic LN and Ha = 1.24 eV for single crystal LN.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1658/1/012010