摘要
双手性铁电液晶３Ｍ２ＣＰＯＯＢ的自发极化和介电常数非常大，由于表面作用的影响，冷却和加热过程的介电常数呈现出一个大的回滞．在电场作用下液晶的螺旋态和螺旋展开态之间的转换，由此引起光散射的变化所产生的电光效应，其阈值电场极小，并与盒厚和温度有关，响应时间在μｓ级．
Double-chirality ferroelectric liquid crystal 3M2CPOOB has extremely large spontaneous polarization and very high dielectric constant.Because of molecule-surface interaction,dielectric constant exhibits novel behaviors.The electro-optic effect utilizing the change of a light scattering by transition between wound and unwound states of the helicoidal structure characteristic of ferroelectric liquid crystal shows a low threshold field and a short response time in range of EMBED Equation .Also a bistable state can be established due to the balance between the forces of the chirality and the wall effect.
出处
《河南大学学报（自然科学版）》
CAS
1997年第3期33-38,共6页
Journal of Henan University:Natural Science
关键词
铁电液晶
介电特性
电光特性
ferroelectric liquid crystal
helicoidal stucture
spontaneous polarization
dielectric constant
threshold field
response time
