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Phase Transition of Nematic Liquid Crystal Induced by External Magnetic Field(PDF)

《南京师大学报（自然科学版）》[ISSN:1001-4616/CN:32-1239/N]

Issue:
2006年01期
Page:
34-38
Research Field:
物理学
Publishing date:

Info

Title:
Phase Transition of Nematic Liquid Crystal Induced by External Magnetic Field
Author(s):
Wang Bili 1;  2;  Liu Hong1
( 1. S ch ool of Phys ical Science and T echnology, Nan jing Norm alU n ivers ity, N an jing 210097, C h ina)
( 2. Departm en t of Phys ics, Yan cheng T each ers College, Yancheng 224002, Ch ina)
Keywords:
nem a tic liqu id c rysta; l phase transition theo ry;  ex ternal fie ld;  interaction energy;  m ean fie ld ;  theory
PACS:
O753.2
DOI:
-
Abstract:
U sing a simp lem ode l o f rod- like liqu id crysta l( LC) mo lecu le, an inte raction be tw een arbitrary shape r ig id m o lecu les is considered as the superposition of rod- to-rod inte ractions. W ith the consideration o f an ex terna lm agnetic field, a phase diagram is obtained. The resu lt show s that because of the exte rnal field, the un iax ia l shape m olecu les w ill form a pa ra-un ia ix al nem atic phase at h igher tem pe ra ture. Increasing biax ia lity ofm o lecu lar shape, the system w ill fo rm a pa ra-biax ia l nem atic phase at higher temperature. Decreasing tem perature, the system w ill continuously enter into no rm al biax ia l phase.

References:

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[ 4] Er isken B J, Berge rsen B, Palffy-M uho ray P. Phase behav iour o f nam atics in the presence o f e lectr ic and magnetic fie lds [ J] . M o l Cryst L iq Cryst, 1987, 148: 45- 59.
[ 5] 刘红, 王慧. 双轴向列相液晶的相变理论[ J]. 物理学报, 2005, 54( 3) : 1306-1312.

Memo

Memo:
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Last Update: 2013-05-05