Abstract
AbstractExperimental investigations on tris‐sarcosine calcium chloride (TSCC)‐type crystals reveal that pure TSCBr and TSCJ are quantum paraelectrics. Measurements of the concentration dependence of phase transition temperature and order parameter, of the pressure dependence of phase transition temperature and of the shift of permittivity peak due to an external electric field show a pronounced influence of quantum fluctuations on the behaviour of these crystals. Based on the model of coupled anharmonic oscillators it is possible to describe all essential ferroelectric properties of the crystal system using only few model parameters in consistent manner. The proposed model can be successfully applied to other quantum paraelectrics.
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