Journal of Physical Studies 26(2), Article 2701 [7 pages] (2022) DOI: https://doi.org/10.30970/jps.26.2701 INFLUENCE OF HYDROSTATIC PRESSURE ON DYNAMIC DIELECTRIC CHARACTERISTICS OF RbHSO4 A. S. Vdovych1 , R. R. Levitskii1, I. R. Zachek2, A. P. Moina1  1Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine, 1, Svientsitskii St., Lviv, UA–79011, Ukraine, 2National University “Lviv Polytechnic”, 12, Bandery St., Lviv, UA–79013, Ukraine Received 22 November 2021; in final form 15 February 2022; accepted 22 February 2022; published online 20 May 2022

Within the modified four-sublattice pseudospin model of deformed RbHSO$_{4}$ ferroelectrics, using the Glauber method and the mean field approximation, we calculate the dynamic dielectric permittivity of a mechanically clamped crystal and explore its dependence on hydrostatic pressure in wide temperature and frequency ranges. A satisfactory quantitative agreement with the experimental data is obtained.

Key words: ferroelectrics, dielectric permittivity, pressure effects.

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