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Volume Dependence of Dielectric Properties of Some Fluorite‐Structure Crystals
Author(s) -
Dutt N.,
Agrawal G. G.,
Shanker J.
Publication year - 1985
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221310211
Subject(s) - polarizability , dielectric , fluorite , volume (thermodynamics) , displacement (psychology) , transverse plane , materials science , range (aeronautics) , analytical chemistry (journal) , thermodynamics , chemistry , mineralogy , physics , composite material , organic chemistry , psychology , optoelectronics , structural engineering , molecule , engineering , metallurgy , psychotherapist
The experimental data on first and second order pressure derivatives of dielectric constants are used to make an analysis of the volume dependence of polarizabilities, effective charge parameter, and transverse‐optic‐mode frequencies in CaF 2 , SrF 2 , BaF 2 , PbF 2 , Sr(NO 3 ) 2 , Ba(NO 3 ) 2 , and Pb(NO 3 ) 2 . The short range force constant responsible for the ion‐displacement polarizability is calculated with the help of Lundqvist's three‐body interaction model. Reasonable values for the volume derivatives of various dielectric parameters are obtained. Values of optic‐mode‐Grüneisen parameters and their volume derivatives are also calculated and compared with available experimental data.