Abstract
Dynamic Kerr effect behaviour and transient molecular reorientation were investigated in thin layer of some alkyl cyanobiphenyl liquid crystals in the nematic phase at several temperatures and in an electro-optical system based on homeotropic-homogeneous alignment. All of the Kerr effect transients were obtained using homeotropically aligned samples. The variation of the relaxation decay time with temperature is very small, and low activation energies are obtained for the cooperative reorientation of the whole samples. The shapes of the Kerr decay transient for large retardations and the static Kerr constants of the liquid crystals were also studied using a computer program of MathCad 4.0.
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