Theory of chiral-racemic mixtures near the Smectic C-Smectic A transition point: dependence of spontaneous polarization and transition temperature on enantiometric excess

A simple theoretical model is proposed for describing thermodynamic properties of chiral- racemic mixtures. It is shown that in the case of chiral-racemic mixtures, spontaneous polarization tends to be linear and Smectic C--Smectic A transition temperature--quadratic function of the enantiometric excess, which is confirmed by our experimental data.