Abstract
Dielectric relaxation processes in an antiferroelectric liquid crystal (AFLC) have been investigated over a wide range of frequencies from 1 Hz to 1 GHz. The AFLC under investigation possesses a variety of different ferrielectric, ferroelectric, and antiferroelectric phases. Dielectric and polarization measurements under direct bias voltage have been made with a view to clarifying the origin of the high-temperature ferrielectric phase, which appears between the AF and smectic-C phases. This phase is assigned to an unstable ferrielectric phase with [formula presented] parameter greater than 1/2 (according to the Ising model) or a doubly modulated incommensurate phase (according to the expanded Landau model). The results are also supported by conoscopy.
Original language | English |
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Pages (from-to) | 4345-4353 |
Number of pages | 9 |
Journal | Physical Review E |
Volume | 55 |
Issue number | 4 |
DOIs | |
Publication status | Published - 1997 |
Externally published | Yes |