ABSTRACT In this study, the dielectric properties and ac conductivity mechanism of pyridine-based rod-like liquid crystals (LC1 and LC2), which show enantiotropic smectic A mesophase, have been investigated by impedance spectroscopy within the frequency interval of 1 kHz–2 MHz. The variation of real and imaginary component of dielectric constant with angular frequency has been investigated. The temperature-dependent absorption coefficient α, relaxation time τ o, dielectric strength value Δε, temperature-dependent changes on crystal, SmA and Iso phases have been given. These values were obtained by fitting the experimental results in ε ′-ω graph with the Cole-Cole equation real equation and Origin Pro Graph program. The frequency dependence of ac conductivities has also been analyzed. Different conductivity mechanisms, i.e. dc conductivity, correlated barrier hoping and quantum mechanical tunneling behaviors have been determined for different frequency regions.

中文翻译：

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吡啶基棒状液晶的介电参数和导电机制比较

摘要 在这项研究中，吡啶基棒状液晶（LC1 和 LC2）的介电性质和交流电导机制显示出对映近晶 A 中间相，已通过阻抗谱在 1 kHz–2 MHz 的频率间隔内进行了研究。 . 研究了介电常数的实部和虚部随角频率的变化。已经给出了温度相关的吸收系数 α、弛豫时间 τ o、介电强度值 Δε、晶体、SmA 和 Iso 相的温度相关变化。这些值是通过将 ε ′-ω 图中的实验结果与 Cole-Cole 方程实方程和 Origin Pro Graph 程序拟合得到的。还分析了交流电导率的频率依赖性。不同的导电机制，即直流电导率，