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Antiferroelectric Bent-Core Liquid Crystal for Possible High-Power Capacitors and Electrocaloric Devices
Crystals ( IF 2.4 ) Pub Date : 2020-07-30 , DOI: 10.3390/cryst10080652
Rony Saha , Chenrun Feng , Alexey Eremin , Antal Jákli

We present small-angle X-ray scattering, polarized optical microscopy and electric current measurements of a sulfur-containing bent-core liquid crystal material for characterization of the layer and director structures, thermally and electrically driven transitions between antiferroelectric and ferroelectric structures and switching properties. It was found that the material has polarization-modulated homochiral synclinic ferroelectric (SmCsPFmod), homochiral anticlinic antiferroelectric (SmCaPA) and racemic synclininc antiferroelectric (SmCsPA) structures that can be reversibly switched between each other either thermally and/or electrically. High switching polarization combined with softness of the liquid crystalline structure makes this compound a good candidate for applications in high-power capacitors and electrocaloric devices.

中文翻译:

适用于可能的大功率电容器和电热器件的反铁电弯曲芯液晶

我们介绍了含硫弯曲芯液晶材料的小角X射线散射,偏振光学显微镜和电流测量,用于表征层和指向矢结构,反铁电和铁电结构之间的热电驱动过渡以及开关特性。已发现该材料具有极化调制的同手性顺手性铁电体(SmC s P Fmod),同手性抗斜反铁电体(SmC a P A)和外消旋的顺斜齿铁电体(SmC s P A)可以在热和/或电之间可逆地切换的结构。高开关极化和液晶结构的柔软性使该化合物成为高功率电容器和电热器件中应用的良好选择。
更新日期:2020-07-30
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