铁电液晶SmC^＊相介电特性的研究

Dielectric Properties in SmC~* Ferroelectric Liquid Crystals

建立了铁电液晶ＳｍＣ*相介电特性的分子理论，求出在外加交变电场作用下液晶系统的自由能密度，得到极化强度〈Ｐ〉和复介电常数ε*的近似表达式。结果表明ε*是外加交变电场的角频率、幅值、温度以及液晶的分子结构参数的函数。

The molecular theory of the dielectric properties in SmC* ferroelectric liquid crystals is presented. The free energy density of liquid crystals system at the external alternating electric field is obtained. The approximate formula of polarization P and complex dielectric constant ε* are obtained. It is shown that the ε* is a function of the angular frequency and amplitued of the applied electric field , temperature and molecular structure parameters of liquid crystals.