Influence of uniaxial and hydrostatic pressures and shear stress $\sigma_{5}$ on the phase transition and thermodynamic properties of quasi-one-dimensional ferroelectrics of the CsH$_2$PO$_4$ type

: pp. 64–78
Received: November 10, 2019
Revised: January 12, 2020
Accepted: January 13, 2020
Institute for Condensed Matter Physics
Lviv Polytechnic National University
Institute for Condensed Matter Physics
Institute for Condensed Matter Physics

Within the framework of the modified proton ordering model for the quasi-one-dimensional hydrogen bonded ferroelectrics of the CsH$_2$PO$_4$ type with taking into account the linear in the strains  $\varepsilon_1$, $\varepsilon_2$, $\varepsilon_3$, and $\varepsilon_5$ contributions into the energy of the proton subsystem, without tunneling, using the two-particle cluster approximation, we study the influence of uniaxial pressures $p_{i}$, hydrostatic pressure $p_{h}$, and shear stress $\sigma_{5}$ on the phase transition, polarization, transverse dielectric permittivity, elastic constants and piezoelectric coefficients of the quasi-one-dimensional CsH$_2$PO$_4$ ferroelectric crystals.

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Mathematical Modeling and Computing, Vol. 7, No. 1, pp. 64–78 (2020)