Orientational order in three nO.m liquid crystalline compounds

Usha, M. K. and Pardhasaradhi, P. and Vinutha, N. and Revannasiddaiah, D. (2015) Orientational order in three nO.m liquid crystalline compounds. PHASE TRANSITIONS, 88 (4). pp. 383-395. ISSN 1029-0338

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Official URL: https://doi.org/10.1080/01411594.2014.971325

Abstract

Refractive index and density measurements have been carried out on three nO.m liquid crystalline compounds, namely, 4O.2, 4O.3 and 1O.10 belonging to the N-(p-n-alkoxybenzylidene)-p-n-alkylaniline series. From the data, the orientational order parameter has been estimated using Vuks and Neugebauer local field models. Furthermore, the orientational order parameter has been calculated directly from refractive index data employing the Vuks scaling factor method, Neugebauer f(B) parameter, effective geometry parameter and a method proposed by Kuczynski et al. It is observed that order parameter values estimated from different methods agree well near the nematic-isotropic transition and diverge as the nematic phase attains equilibrium. The temperature gradient of refractive indices and the nematic crossover temperatures have also been estimated for these compounds. The results obtained are compared and discussed.

Item Type: Article
Subjects: D Physical Science > Physics
Divisions: Department of > Physics
Depositing User: Shrirekha N
Date Deposited: 11 Jun 2019 10:05
Last Modified: 11 Jun 2019 10:05
URI: http://eprints.uni-mysore.ac.in/id/eprint/2752

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