Short range orientational order in nematic liquid crystals

Madhusudana, N. V. ; Savithramma, K. L. ; Chandrasekhar, S. (1977) Short range orientational order in nematic liquid crystals Pramana - Journal of Physics, 8 (1). pp. 22-35. ISSN 0304-4289

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The different approximations that have been used in applying Bethe's cluster model to the nematic-isotropic phase transition are examined. It is shown that the introduction of a higher order term in the mean field potential of an outer molecule of the cluster improves the consistency of the theory considerably. In particular, the importance of satisfying Chang's relation is emphasized. Calculations are presented of the long and short range order parameters, heat of transition and specific heat for different values of z, the number of nearest neighbours around any given molecule, for both nonpolar and antiparallel near neighbour correlations. Even the new mean field potential appears to be inadequate for z=3.

Item Type:Article
Source:Copyright of this article belongs to Indian Academy of Sciences.
Keywords:Short Range Order; Nematic Liquid Crystals
ID Code:7700
Deposited On:25 Oct 2010 10:48
Last Modified:16 May 2016 17:50

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