Dielectric relaxation in liquid crystals exhibiting a reentrant phenomenon
- 1 January 1984
- journal article
- Published by EDP Sciences in Journal de Physique Lettres
- Vol. 45 (6) , 283-288
- https://doi.org/10.1051/jphyslet:01984004506028300
Abstract
This paper presents the experimental results of the dielectric characterization of mesomorphic compounds exhibiting reentrant or double reentrant phases. The comparison of activation energies in the flip-flop rotation of molecules in the different phases leads us to conclude that : — the activation energy in the reentrant nematic phase is higher than that of the nematic phase, — the activation energy in the reentrant smectic A phase is similar to that of the reentrant nematic phase. To the best of our knowledge, this study presents the first complete dielectric characterization of the double reentrant phenomenonKeywords
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