Open AccessInfluence of External Pressures of Different Symmetry on the Phase Transitions and Thermodynamic of the RbHSO4 Ferroelectrics
Author(s) -
І. Р. Зачек,
R. R. Levitsky,
А. С. Вдовыч,
M. C. Karkuljevska
Publication year - 2015
Publication title -
fìzika ì hìmìâ tverdogo tìla
Language(s) - English
Resource type - Journals
eISSN - 2309-8589
pISSN - 1729-4428
DOI - 10.15330/pcss.16.2.276-283
Subject(s) - piezoelectricity , phase transition , condensed matter physics , hydrostatic pressure , dielectric , materials science , polarization (electrochemistry) , dielectric permittivity , tensor (intrinsic definition) , permittivity , hydrostatic equilibrium , crystal (programming language) , coupling (piping) , phase (matter) , symmetry (geometry) , thermodynamics , physics , chemistry , mathematics , composite material , geometry , quantum mechanics , optoelectronics , computer science , programming language
We use the four-sublattice model of the RbHSO4 crystal modified by taking into account the piezoelectric coupling to the strains , . Within the mean field approximation we calculate the components of the polarization vector and static dielectric permittivity tensor of mechanically clamped and free crystals, as well as their piezoelectric characteristics. We study the influence of hydrostatic pressure and uniaxial stresses on the phase transition and physical characteristics of the crystal. A good quantitative description of the experimental data is obtained.