K L Savithramma
Articles written in Pramana – Journal of Physics
Volume 8 Issue 1 January 1977 pp 22-35 Liquids
Short range orientational order in nematic liquid crystals
N V Madhusudana K L Savithramma S Chandrasekhar
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
Volume 10 Issue 4 April 1978 pp 349-356 Statistical Physics
Equivalence of the Krieger-James approximation and the constant-coupling approximation in magnetism
K L Savithramma N V Madhusudana
We have applied the Krieger-James approximation to a description of short range order effects in both ferro- and antiferromagnetism. In this method, a mechanical consistency condition is imposed on the probability distribution of a pair of near neighbours in a cluster of (
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