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Ferroelectricity
Dielectric, electromechanical, and elastic properties of Rb$_{1-x}$(NH$_{4}$)$_{x}$H$_{2}$PO$_{4}$ single crystals
L. N. Korotkova, D. V. Likhovayab, R. R. Levitskiic, I. R. Zachekc a Voronezh State Technical University
b Voronezh Institute of State fire service of EMERCOM of Russia
c Institute of Physics of Condensed Systems, National Academy of Sciences of Ukraine, Ukraine
Abstract:
The longitudinal dielectric, piezoelectric, and elastic characteristics of ferroelectric RbH$_{2}$PO$_{4}$ and antiferroelectric NH$_{4}$H$_{2}$PO$_{4}$ crystals are calculated in terms of the modified model of proton ordering with allowance for the piezoelectric coupling in an approximation of a four-particle cluster. The results obtained agree well with known experimental data. Along with this, the electromechanical properties of a Rb$_{0.2}$(NH$_{4}$)$_{0.8}$H$_{2}$PO$_{4}$ single crystal undergoing an antiferroelectric phase transition have been studied experimentally over a wide temperature range. The model predictions and the experimental data agree qualitatively.
Received: 16.03.2016 Revised: 06.06.2016
Citation:
L. N. Korotkov, D. V. Likhovaya, R. R. Levitskii, I. R. Zachek, “Dielectric, electromechanical, and elastic properties of Rb$_{1-x}$(NH$_{4}$)$_{x}$H$_{2}$PO$_{4}$ single crystals”, Fizika Tverdogo Tela, 59:1 (2017), 82–87; Phys. Solid State, 59:1 (2017), 83–88
Linking options:
https://www.mathnet.ru/eng/ftt9710 https://www.mathnet.ru/eng/ftt/v59/i1/p82
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Abstract page: | 23 | Full-text PDF : | 10 |
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