Gangwar, Lokesh K. and Bawa, Ambika and Choudhary, Amit and Singh, Surinder P. (2018) Collective dielectric processes at the transition temperature of the Sm-C* and Sm-A* phase in a ferroelectric liquid crystal. Physical Review E , 97 (6). 062707-062712. ISSN 2470-0045
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Abstract
An anomalous dielectric relaxation process, called the partially unwound helical mode (p-UHM), is a collective dielectric process apart from the well known Goldstone and soft mode process; it is studied in the smectic C* (Sm-C*) phase and at the transition temperature of the Sm-C*-Sm-A* phase in the ferroelectric liquid crystal (FLC) material. To avoid the surface effect, a thick cell of 40 mu m thickness was prepared with highly rubbed surfaces of the ITO substrates. It has been observed that the dielectric properties in Sm-C* and at the T-c temperature are dominated by the p-UHM process which is dependent on an applied oscillating field in the Sm-C* phase. The probing ac and dc bias field dependences of all these collective dielectric processes have been reported in the Sm-C* and Sm-A* phases of FLC materials.
| Item Type: | Article |
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| Additional Information: | Copyright for this article belongs to M/s American Physical Society. |
| Subjects: | Physics > Mathematical Physics Physics > Physics of Fluids and Plasmas |
| Divisions: | UNSPECIFIED |
| Depositing User: | Users 27 not found. |
| Date Deposited: | 16 Dec 2019 11:35 |
| Last Modified: | 16 Dec 2019 11:35 |
| URI: | http://npl.csircentral.net/id/eprint/3810 |
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