Journal of Physical Studies 23(3), Article 3702 [8 pages] (2019) DOI: https://doi.org/10.30970/jps.23.3702 EFFECT OF STRESSES σ5, σ6 AND ELECTRIC FIELD E3 ON THERMODYNAMIC CHARACTERISTICS OF GPI FERROELECTRIC A. S. Vdovych1, R. R. Levitskii1, I. R. Zachek2 1Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine 1, Svientsitskii St., Lviv, UA--79011, Ukraine 2Lviv Polytechnic National University 12, Bandery St., Lviv, UA--79013, Ukraine

The model of glycine phosphite (GPI) ferroelectric, modified by taking into account the piezoelectric coupling between the ordering structure elements and the lattice strains $\varepsilon_j$, is used for the investigation into the effects appearing under shear stresses $\sigma_5$, $\sigma_6$ and electric field $E_3$. Within the framework of the two particle cluster approximation, the components of the polarization vector and the static dielectric permittivity tensor of a mechanically clamped crystal, and also their piezoelectric and thermal characteristics are calculated. The simultaneous effects of shear stress $\sigma_{5}$ and field $E_3$ as well as the effects of stress $\sigma_{6}$ and field $E_3$ on the phase transition and physical characteristics of the crystal are studied.

PACS number(s): 77.22.-d, 77.22.Ch, 77.22.Ej, 77.65.-j, 77.80.Bh

pdf

1. S. Dacko, Z. Czapla, J. Baran, M. Drozd, Phys. Lett. A 223, 217 (1996);
   CrossRef
2. I. Stasyuk, Z. Czapla, S. Dacko, O. Velychko, Condens. Matter Phys. 6, 483 (2003);
   CrossRef
3. I. Stasyuk, Z. Czapla, S. Dacko, O. Velychko, J. Phys. Condens. Matter. 16, 1963 (2004);
   CrossRef
4. I. Stasyuk, O. Velychko, Ferroelectrics 300, 121 (2004);
   CrossRef
5. I. R. Zachek, Ya. Shchur, R. R. Levitskii, A. S. Vdovych, Physica B 520, 164 (2017);
   CrossRef
6. I. R. Zachek, R. R. Levitskii, A. S. Vdovych, I. V. Stasyuk, Condens. Matter Phys. 20, 23706 (2017);
   CrossRef
7. I. R. Zachek, R. R. Levitskii, A. S.Vdovych, Condens. Matter Phys. 21, 33702 (2018);
   CrossRef
8. J.Nayeem et al., Ferroelectrics, 332, 13 (2006);
   CrossRef
9. J. Nayeem, H. Wakabayashi, T. Kikuta, T. Yamazaki, N. Nakatani, Ferroelectrics 269, 153 (2002);
   CrossRef
10. F. Shikanai, J. Hatori, M. Komukae, Z. Czapla, T. Osaka, J. Phys. Soc. Jpn. 73, 1812 (2004);
    CrossRef
11. M. Wiesner, Phys. Status Solidi (b) 238, 68 (2003);
    CrossRef
12. I. R. Zachek, R. R. Levitskii, A. S. Vdovych, Condens. Matter Phys. 20, 43707, (2017),
    CrossRef
13. I. R. Zachek, R. R. Levitskii, A. S. Vdovych. J. Phys. Stud. 21, 1704, (2017).
14. A. S. Vdovych, I. R. Zachek, R. R. Levitskii, Math. Model. Comput. 5, 242, (2018);
    CrossRef