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Dielectric relaxation spectroscopy and electro-optical studies of phase behaviour of a chiral smectic liquid crystal |
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| Authors: | R. Zgueb H. Dhaouadi T. Othman |
| Affiliation: | 1. Département de physique, Faculté des Sciences de Tunis, Laboratoire de physique de la matière molle et de modélisation électromagnétique (LP3ME), Université Tunis Elmanar, Tunis, Tunisierihab_zgueb@yahoo.fr;3. Département de physique, Faculté des Sciences de Tunis, Laboratoire de physique de la matière molle et de modélisation électromagnétique (LP3ME), Université Tunis Elmanar, Tunis, Tunisie |
| Abstract: | Dielectric relaxation processes in various phases of a chiral smectic liquid crystal compound have been investigated over a wide range of frequencies from 10 to 300 kHz. Dielectric spectroscopy reveals the existence of two relaxation frequencies corresponding to the ferroelectric and ferrielectric Goldstone modes in the range of temperature where two different phases coexist. This phenomenon of coexistence is examined with respect to the cell thickness and reversal temperature. |
| Keywords: | chiral liquid crystal dielectric spectroscopy electro-optical measurements coexistence phenomenon |