A comparison of orientational behaviour and rotational bias in SmC, SmC_a and SmC_γ* phases of an antiferroelectric liquid crystal studied by FT-IR spectroscopy

Yu. P. Panarin Laboratory of Advanced Materials, Trinity College, University of Dublin, Dublin, 2, Ireland; Dublin Institute of Technology, Kevin street, Dublin, 8, Ireland

O. E. Kalinovskaya Laboratory of Advanced Materials, Trinity College, University of Dublin, Dublin, 2, Ireland

J. K. Vij Laboratory of Advanced Materials, Trinity College, University of Dublin, Dublin, 2, Ireland

D. D. Parghi Department of Chemistry, University of Hull, Hull, HU6 7RX, UK

M. Hird Department of Chemistry, University of Hull, Hull, HU6 7RX, UK

J. W. Goodby Department of Chemistry, University of Hull, Hull, HU6 7RX, UK

Abstract

The structural transformations in antiferroelectric liquid crystal are investigated by the measurement of the macroscopic polarization. The experimentally found phase transition sequence in several different compounds is found to be well describable by the ANNNI model, which includes the effect of the temperature as well as the electric field on the molecular arrangements in ferrielectric phases.

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A comparison of orientational behaviour and rotational bias in SmC, SmC_a and SmC_γ* phases of an antiferroelectric liquid crystal studied by FT-IR spectroscopy

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A comparison of orientational behaviour and rotational bias in SmC*, SmCa* and SmCγ* phases of an antiferroelectric liquid crystal studied by FT-IR spectroscopy

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A comparison of orientational behaviour and rotational bias in SmC, SmC_a and SmC_γ* phases of an antiferroelectric liquid crystal studied by FT-IR spectroscopy