RELAXATION INTENSITY OF CHOLESTERYL CHLORIDE, EBBA AND SOLID-PHASE OHMBBA FROM DIELECTRIC LOSS DATA

Empirical formula for evaluating the dielectric relaxation intensity, or the magnitude of dielectric dispersion from dielectric loss data (D ELTAepsilon = epsilon0 - epsilon(infinity) in a limited range of frequ ency around the relaxation frequency for the Cole-Cole relaxation has been evaluated for three liquid crystals, namely cholesteryl chloride, N-(p-ethoxybenzylidine)-p-butylaniline (EBBA) and solid phase N-(2)-h ydroxy-4-methoxybenzylidine)-p-butylaniline (OHMBBA). The relaxation i ntensity has been expressed in terms of the dielectric loss maxima eps ilon(M)'' and the frequency separation W for half, two third or three quarters of epsilon(M)'' in the form DELTAepsilon = epsilon(M)''/[C1/W + C2 + C3 W]. The numerical constants C1, C2 and C3 are given for the respective types of relaxation.