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Electro-optic and dynamic studies of biphenyl benzoate ferroelectric liquid crystals

机译:联苯甲酸苯酯铁电液晶的电光和动力学研究

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摘要

We present electro-optic and dynamic properties on three homologous of biphenyl benzoate series of ferroelectric liquid crystals (FLCs) exhibiting the chiral smectic C phase (SmC~*). The three compounds present high spontaneous polarization and show the SmC~*–SmA~*–N~* phase sequence. Dielectric spectroscopy was used to provide the dynamics and dipolar ordering of the ferroelectric phase. The Goldstone relaxation mode was studied for sample cells on planar geometry without a DC bias voltage. The rotational viscosity corresponding to molecular motions in the SmC~* phase was determined from dielectric measurements. The Arrhenius-type behavior of the rotational viscosity was found and the corresponding activation energies were evaluated.
机译:我们提出了三个手性近晶C相(SmC〜*)的铁电液晶联苯苯甲酸系列的三个同源物的电光和动力学性质。这三种化合物呈现高自发极化并显示SmC〜* –SmA〜* –N〜*相序。介电谱用于提供铁电相的动力学和偶极顺序。对于没有直流偏置电压的平面几何形状的样品池,研究了戈德斯通松弛模式。通过介电测量确定与SmC〜*相中分子运动相对应的旋转粘度。发现了旋转粘度的阿伦尼乌斯型行为,并评估了相应的活化能。

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