![Sample our Physical Sciences journals, sign in here to start your FREE access for 14 days]({"type":"image" , "src" : "/sda/110819/TOC-Subject-Sample-2021-Physical-Sciences.jpg"})
Abstract
The influence of a.c. electric field (5 kHz) on the IR and FIR spectra of the nematic phase of three liquid crystals with strong positive dielectric anisotropy (ε a ∼ 15) was investigated. The changes in the half-band widths with increasing electric field intensity are explained by means of the changes in the molecular reorientation in respect to different axes due to the ordering effect of the electric field. The orientational order parameter S 2 for homeotropic and homogeneous samples was calculated and its temperature dependence was studied.