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Influence of shear stress $σ_6$ on the phase transition and physical properties of KD2PO4 type ferroelectrics

I. V. Stasyuk·R. R. Levitskii·I. R. Zachek·A. P. Moina·A. S. Duda
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Abstract

Within the four-particle cluster approximation for the proton ordering model we study the influence of shear stress $σ_6$ on the phase transition, static dielectric, elastic and thermal properties of deuterated KD2PO4 type ferroelectrics. Thermodynamic potentials and physical characteristics of the crystals in the presence of stress $σ_6$ are calculated. Numerical analysis of the obtained results is performed, and the set of the theory parameters providing the best fit to the available experimental data is found. The $Tc-σ_6$ phase diagram is constructed; temperature dependences of the calculated quantities are studied, possible stress dependences are indicated. Influence of $σ_6$ stress is analogous to that of electric field conjugate to the order parameter.

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I. V. Stasyuk, R. R. Levitskii, I. R. Zachek, A. P. Moina, A. S. Duda. 1999-11-25. Influence of shear stress $σ_6$ on the phase transition and physical properties of KD2PO4 type ferroelectrics. https://arxiv.org/abs/cond-mat/9911370

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