Magnetic-Field-Induced Weak Order in Nematic Liquid Crystals Formed by Biaxial Molecules  

作　　者：ZHANG Zhi-Dong ZHANG De-Xian SUN Yu-Bao 张志东;张德贤;孙玉宝(Department of Physics,Hebei University of Technology,Tianjin 300130)

机构地区：[1]Department of Physics,Hebei University of Technology,Tianjin 300130

出　　处：《Chinese Physics Letters》2000年第10期749-751,共3页中国物理快报（英文版）

基　　金：Supported by the Hebei Province Natural Science Foundation of China under Grant No.198002.

摘　　要：Nematic liquid crystal system of interacting biaxial particles via dispersion forces is studied.The molecular orienting potential form in a magnetic field is given for the first time.Weakly ordered isotropic phase is treated in the two-particle cluster approximation.Taking account of the molecular biaxiality,it is found that the ratio of the lowest supercooling temperature T^(*)to the nematic-isotropic phase transition temperature TC approaches the observed value,and the validity of the mean field theory is clarified.

关 键 词：NEMATIC ISOTROPIC clarified 

分 类 号：O46[理学—电子物理学]