Theoretical study of order parameter at different temperature by known data of optical anisotropy of new nematic liquid crystal 4’-cyano-(4-chlor-benzylox)-azobenzene

The importance of liquid crystals lies in their extensive use in display devises, as well as many other scientific applications. However the use of liquid crystals in different devises depends upon various properties owned by them like order parameter, dielectric constant, dielectric anisotropy, birefringent behaviour, optical transmittance, elastic constants etc. The nematic liquid crystalline state can be described through its positional, orientational order. The orientational order is measure of how the rings and functional groups within a molecule are oriented. In view of applications in the liquid crystal display, it is usually the orientation order parameter S which is most important. Optical anisotropy data used to determine order parameter new nematic liquid crystal 40-cyano-(4-chlorbenzyloxy)- azobenzene by Vuks approach and also its variation with temperature has been discussed. PACS: 61.30.v, 42.70.Df