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Electric‐Field‐Induced Piezoelectricity of Some Pure and Doped Alkali Halides
Author(s) -
Radgen B.,
Mlitzke M.,
Mohler E.
Publication year - 2001
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 - 10.1002/1521-3951(200102)223:3<701::aid-pssb701>3.0.co;2-7
Subject(s) - electrostriction , halide , chemistry , alkali metal , electric field , piezoelectricity , doping , analytical chemistry (journal) , dielectric , materials science , physics , condensed matter physics , inorganic chemistry , chromatography , composite material , optoelectronics , quantum mechanics , organic chemistry
We show that the measurement of electric‐field‐induced piezoelectricity is a sensitive method to determine third‐order derivatives of the thermodynamic potential functions with respect to electric field and mechanical stress in pure and doped alkali halide crystals. The method is equivalent to a determination of the stress derivatives of the dielectric constant and to a measurement of quadratic electrostriction. Experiments are performed on LiF, KCl, KBr, KCl–KBr mixtures, and RbCl : Ag + . For the pure materials we can confirm most of the stress and electrostriction coefficients known from recent work. However, no indication is found of unusually large coefficients for KCl–KBr mixtures and for RbCl:Ag + which have been reported in the literature.