Dielectric Behavior and the Devil's Staircase in the SmC<SUB>α</SUB><SUP>*</SUP> Phase of an Antiferroelectric Liquid Crystal, 4-(1-methylheptyloxycarbonyl)phenyl 4′-octylcarbonyloxybiphenyl-4-carboxylate
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We have observed an increase of the dielectric constant under a bias electric field in the SmC<SUB>A</SUB><SUP>*</SUP> and SmC<SUB>α</SUB><SUP>*</SUP> phases in 4-(1-methylheptyloxycarbonyl) phenyl 4′-octylcarbonyloxybiphenyl-4-carboxylate. This implies a field-induced phase transition to the ferrielectric and/or to the ferroelectric phases. The transitions were also clearly observed in the field-induced apparent tilt angles in these phases. The electric-field-induced Devil's staircase was confirmed in the SmC<SUB>α</SUB><SUP>*</SUP> phase. Using these observations, a <I>T</I>(temperature)-<I>E</I>(electric field) phase diagram was drawn.
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公益社団法人 応用物理学会 | 論文
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