Roy, SS, Majumder, TP and Roy, SK (1997) Soft mode dielectric relaxation under the influence of bias electric field of a ferroelectric liquid crystal mixture. MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 304 . pp. 315-320. [Journal article]
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Temperature dependent soft mode part of the complex dielectric constant has been measured as a function of bias electric field both in the smectic C* and smectic A* phases for a ferroelectric liquid crystal (FLC) mixture. From the experimental data, soft mode relaxation frequency and dielectric strength have been determined both in smectic C* and smectic A* phases. In smectic B* phase, relaxation frequency and inverse of dielectric strength of the FLC mixture does not follow the Curie-Weiss law. The critical exponent for the studied FLC mixture is 1.43. Dielectric results shows a dependence of soft mode dielectric strength and relaxation frequency with bias field near the transition temperature in smectic A* phase to an extent of 1 degrees C above the transition temperature and above 1 degrees C bias field does not have any effect on relaxation frequency and dielectric strength It is observed that relaxation frequency increases with increasing bias held while the corresponding dielectric strength decreases.
|Item Type:||Journal article|
|Faculties and Schools:||Faculty of Computing & Engineering|
Faculty of Computing & Engineering > School of Engineering
|Research Institutes and Groups:||Engineering Research Institute|
Engineering Research Institute > Nanotechnology & Integrated BioEngineering Centre (NIBEC)
|Deposited By:||Dr Susanta Sinha Roy|
|Deposited On:||07 Jun 2010 15:23|
|Last Modified:||18 Aug 2011 12:03|
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