Title: THE EFFECT OF HYDROSTATIC PRESSURE ON TRANSVERSE DIELECTRIC PERMEABILITY OF KH_2PO_4 CRYSTALS
Author(s): V.M.Kedyulich, A.G.Slivka, E.I.Gerzanich, A.M.Guivan (Uzhgorod National University, 32 Voloshin Str., 88000 Uzhgorod, Ukraine)

Temperature dependences of transverse dielectric permeability of KH$_2$PO$_4$ crystals under different values of hydrostatic pressure have been investigated. Within the framework of a tunnelling mode model, the dipole interaction energy and the tunnelling energy are suggested to be determined using the temperature position of the dielectric permeability kinking point. From the temperature dependences of the dielectric permeability $\varepsilon_a(T)$ under various pressures, the pressure dependences of these values are derived.

Key words: ferroelectrics, dielectric permeability, hydrostatic pressure
PACS: 77.80.Bh, 77.22.Ch, 77.84.Fa