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Abstract
We present the fluctuational and switching behaviors in an antiferroelectric phase designated as the AF phase, which appears in a temperature region above the chiral smectic CA ( SmCA*) phase of an antiferroelectric liquid crystal, (S)-4-(1-methylheptyloxy-carbonyl)phenyl 4'-octylbiphenyl-4-carboxylate. It has been confirmed that the relaxation of the Goldstone mode due to an antiferroelectric phase mode occurs in the AF as well as the SmCA* phase. In addition, we have found that the switching behavior of the AF phase depends on the frequency of an applied electric field. The typical tristable switching between AF and SmC* is observed under a triangular wave of frequencies lower than 0.1 Hz, though the field-induced intermediate phase appears around the frequency range corresponding to the relaxation of the Goldstone mode. We speculate the model responsible for the switching behavior of the antiferroelectric AF phase.
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