Influence of pressure on the isotropic to smectic-E phase transition

A phenomenological approach to the description of the pressure effect on the isotropic to smectic-E phase transition is proposed. The influence of pressure on the isotropic to smectic-E transition is discussed by varying the coupling between order parameters and pressure. The pressure dependence of the non-linear dielectric effect in the isotropic phase above the isotropic to smectic-E transition is calculated. The theoretical predictions are found to be in good agreement with experimental results.