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Influence of confining geometry on the dielectric behavior of a FLC sample having TGBA phase

Ray, T, Kundu, S, Roy, SK, Roy, SS, McLaughlin, JAD and Stannarius, R (2004) Influence of confining geometry on the dielectric behavior of a FLC sample having TGBA phase. INTERNATIONAL JOURNAL OF MODERN PHYSICS B, 18 (31-32). pp. 4119-4128. [Journal article]

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We report on the dielectric permittivities in 1 kHz to 4 MHz frequency region of the ferroelectric liquid crystal (FLC) material CB500 having a TGBA phase. Molecular and collective relaxation processes have been studied in bulk and in confined environment. In the bulk sample, a Goldstone mode (GM) and a molecular mode were observed in the SmC* phase and the softmode (SM) was observed in the TGBA phase. The Goldstone mode was also present in the FLC sample confined in 0.2 mu m Anopore membranes. The relaxation frequency of this mode was shifted to the higher-frequency region in comparison to that observed in the bulk sample. In the Anopore confined FLC sample, another relaxation process (AP) was observed, which possibly arises due to some collective movement of the molecules attached to the cavity walls. The relaxation frequency of this process is almost independent of temperature and this process is only observed in the SmC* phase.

Item Type:Journal article
Keywords:dielectric; ferroelectricity; confined geometry; anopore
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)
ID Code:18911
Deposited By: Mrs Ann Blair
Deposited On:19 Jul 2011 07:52
Last Modified:19 Jul 2011 07:52

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