3AC06 「悪魔の階段」で現れる反強誘電性のAF相における集団揺らぎとスイッチング挙動

概要

論文の詳細を見る
We have investigated collective fluctuation and switching behavior in an antiferroelectric phase designated as the AF phase, which appears in a temperature region above the chiral smectic C_A (SmC_A^*) 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 antiferroelectric phase mode occurs in the AF phase as well as SmC_A^*. 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 lower frequencies less than 0.1Hz, 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.
日本液晶学会の論文
1997-09-24