Discovery of a novel ferrielectric phase of five-layer periodicity in binary mixtures of chiral smectic liquid crystals exhibiting unusual reversed phase sequence
Discovery of a novel ferrielectric phase of five-layer periodicity in binary mixtures of chiral smectic liquid crystals exhibiting unusual reversed phase sequence
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在具有不寻常反相序列的手性近晶液晶二元混合物中发现了五层周期性的新型铁电相
DOI：
10.1080/02678292.2011.566943
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发表时间：
2011
期刊：
影响因子：
2.2
通讯作者：
J. Vij
中科院分区：
文献类型：
--
作者：
A. Chandani;A. Fukuda;S. Kumar;J. Vij
在铁电和反铁电液晶二元混合体系中，通过电场感应双折射（EFIB）测量，发现了一个铁电有序的五层新相。EFIB的测量使用光弹性调制器（PEM）装置，并通过向充满铁电和反铁电化合物二元混合物的各向同性排列电池施加平面内电场。在电场-温度（E-T）相图中，恒定双折射的轮廓清楚地表明，在低温侧和高温侧，与四层相邻的一个新相对应的明显区域。这个新阶段的结构是由奥西波夫和戈尔库诺夫计算出来的。
In a binary mixture system of ferroelectric and antiferroelectric liquid crystals whose major component shows an unusual reversed phase sequence of , a new phase with ferrielectric order of five layers has been discovered by the electric field-induced birefringence (EFIB) measurements. The EFIB was measured using a photo-elastic modulator (PEM) set-up and by applying an in-plane electric field to a homeotropic aligned cell filled with the binary mixtures of compounds with ferroelectric and antiferroelectric compounds. The contours of constant birefringence in the electric field–temperature (E–T) phase diagrams clearly indicate a distinct region corresponding to a new phase bordering the four-layer on the low temperature side and on the high temperature side. This new phase is unambiguously assigned to whose structure has been calculated by Osipov and Gorkunov.