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The Influence of Quantum Effects on the Ferroelectric Properties of TSCC‐Type Single Crystals
Author(s) -
Windsch W.,
Braeter H.
Publication year - 1986
Publication title -
annalen der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.009
H-Index - 68
eISSN - 1521-3889
pISSN - 0003-3804
DOI - 10.1002/andp.19864980329
Subject(s) - ferroelectricity , anharmonicity , condensed matter physics , phase transition , materials science , permittivity , dielectric , quantum , quantum phase transition , single crystal , electric field , physics , nuclear magnetic resonance , quantum mechanics , optoelectronics
Experimental 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.