Abstract

The concentration and temperature dependences of the order parameter in single crystals of the solution trissarcosine calcium chloride 1− x bromide x are studied experimentally by measurements of the EPR line splitting δ H( x, T) and P-E hysteresis loops. The model of coupled anharmonic oscillators in the displacive regime with randomly disordered single site potentials is used to calculate the temperature and concentration dependences of the order parameter and the soft optic mode. It is shown that TSCB may be considered to be an incipient ferroelectric.

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