On the Phase Transition of SmC*_A Liquid Crystals
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概要
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A simple microscopic model of the antiferroelectric SmC*_A liquid crystals is proposed so as to analyse a few possible phase transitions between smectic subphases with various macroscopic dipole moments. It is theoretically implied that SmC*_A liquid crystals show a universal phase sequence SmC*_A (Antiferroelectric), SmCγ* (Ferrielectric), and SmC* (Ferroelectric) with increasing temperature in general. This is considered as a consequence of a competition between an attractive dipolar interaction and an excluded volume effect which results in a packing entropy related to the steric hindrance between the biaxial molecules. Also the effect of an external electric field on the phase transition is investigated.
- 社団法人日本物理学会の論文
- 1993-07-15
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