11-13E
11-13E
Role of piezoelectric coupling in behavior of the physical characteristics of regular and disordered ferroelectric compounds of the KH$_{2}$PO$_{4}$ family
The review of theoretical and experimental papers for Rb$_{1 - x}$(NH$_4$)$_x$H$_2$PO$_4$ type materials are presented. It is shown, that results of calculation of physical characteristics of these materials within proposed theory satisfactorily agree with experimental data, with the exception of phase transition region. The results of calculation of physical characteristics of regular KH$_{2}$PO$_{4}$ family compounds with taking into account of piezoelectric coupling are also presented. We have pointed on necessity of taking into account of piezoelectric coupling in mixed crystals.
