THE GOLDSTONE MODE IN MIXTURES CONTAINING FERROELECTRIC LIQUID-CRYSTALS

Measurements of complex electric permittivity of room temperature ferr oelectric liquid crystal mixtures have been made on aligned samples wi th the electric measuring field being parallel to the layer planes. Th e spontaneous polarization, the tilt angles and pitch have been measur ed in these mixtures. By theoretical fitting of the experimental point s of electric permittivity for the Cole-Cole modification of the Debye equation dielectric parameters, the dielectric strength, relaxation f requency, and distribution parameter for the Goldstone mode have been computed. The dielectrically observed Goldstone mode in our mixtures i s shown to have both DC bias field and AC field dependences.