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

paper

Influence of shear stress $σ_{6}$ on the phase transition and physical properties of KD2PO4 type ferroelectrics

arXiv:cond-mat/9911370

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 $T c - σ_{6}$ 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.

38 pages, LaTeX2e, 22 figures, typos corrected

Influence of shear stress σ6​ on the phase transition and physical properties of KD2PO4 type ferroelectrics

Abstract

Influence of shear stress $σ_{6}$ on the phase transition and physical properties of KD2PO4 type ferroelectrics