Dielectric anomaly in ferroelectric liquid crystals with polarization inversion

The dielectric anomaly in ferroelectric liquid crystals, showing polarization inversion, is observed as functions of temperature and external field. The dielectric constant shows an anomalous nonlinear behavior as a function of the electric. In describing the dielectric anomaly, the effective dipole moment, deduced from the field-dependence of the dielectric constant, is introduced into a model of a dynamically fluctuating mixture of at least two interconvertible conformers whose relative densities change with temperature and an external electric field.