Influence of domain structure on the nonlinear polarization properties of A
2
BX
4-group crystals |
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Authors: | V V Gorbatenko V I Kudriash B N Prasolov S A Gorbatenko |
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Institution: | 1. Voronezh Institute, Russian Federation Ministry of the Interior, Voronezh, 394065, Russia
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Abstract: | Harmonic analysis of repolarization in A 2 BX 4-group crystals in the ferroelectric phase near phase-transition temperature T c is used to separate the contributions to the harmonic-component amplitudes in the output signal of a Sawyer-Tower circuit from charging the reference capacitor with capacitive and conductive current through such a crystal. Harmonic analysis of dielectric hysteresis loops obtained by placing a specimen in an electric field with harmonically changing strength reveals general regularities in the evolution of the domain walls of A 2 BX 4-group crystals. It is established that the domain structure affects the nonlinear polarization properties of our specimens. The dependence of the potential relief of ferroelectric ion motion in a harmonically changing electric field is plotted on the basis of the experimental results. |
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