[1]曾明颖.外场中半无限向列相液晶体系的相变[J].华侨大学学报(自然科学版),2013,34(4):385-389.[doi:10.11830/ISSN.1000-5013.2013.04.0385]
 ZENG Ming-ying.Phase Transition of Nematic Liquid Crystal in Semi-Infinite Sample in Outside Magnetic Field[J].Journal of Huaqiao University(Natural Science),2013,34(4):385-389.[doi:10.11830/ISSN.1000-5013.2013.04.0385]
点击复制

外场中半无限向列相液晶体系的相变()
分享到:

《华侨大学学报(自然科学版)》[ISSN:1000-5013/CN:35-1079/N]

卷:
第34卷
期数:
2013年第4期
页码:
385-389
栏目:
出版日期:
2013-07-20

文章信息/Info

Title:
Phase Transition of Nematic Liquid Crystal in Semi-Infinite Sample in Outside Magnetic Field
文章编号:
1000-5013(2013)04-0385-05
作者:
曾明颖
华侨大学 信息科学与工程学院, 福建 厦门 361021
Author(s):
ZENG Ming-ying
College of Information Science and Engineering, Huaqiao University, Xiamen 361021, China
关键词:
体液晶 表面液晶 外磁场 衬底 序参数 耦合强度 相变
Keywords:
bulk liquid crystal surface liquid crystal outside magnetic field substrate order parameter coupling strength phase transition
分类号:
O753.2
DOI:
10.11830/ISSN.1000-5013.2013.04.0385
文献标志码:
A
摘要:
考虑半无限向列相液晶体系在外加场和衬底非线性作用下的相变特征,包括远离衬底的液晶(体液晶)和表面的液晶的相变情况,得到三维体液晶和表面液晶的相变曲面.研究表明:体液晶的相变只和外磁场和温度有关系,而且发生相变的温度和外磁场是呈线性增大的;表面液晶的相变除了与外磁场和温度有关外,还与衬底和表面液晶的耦合强度,以及衬底的序参数有关系.
Abstract:
Taking into account the applied magnetic field and the substrate coupling strength in a semi-infinite sample to the phase character of bulk liquid crystal and the surface, a phase diagram of the three dimension bulk liquid crystal and surface liquid crystal are obtained. It is the conclusion after research: the phase transition of the bulk only relates to the magnetic field and temperature, and the phase transition temperature linear increases with the magnetic field. The phase transition of the surface liquid crystal relates to not only the magnetic field and temperature, but also the coupling strength of the surface liquid crystal and substrate order parameter.

参考文献/References:

[1] DE GENNES P G, PROST J.The Physics of Liquid Crystals[M].Oxford:Oxford Scienc,1993:76-85.
[2] KAGANOV M I,OMELYANCHUK A N.Phenomenologicla theory of phase-transition in a thin ferromagnetic plate[J].Sov Phys Jetp,1972,34:895.
[3] BINDER K,HOHENBERG P C.Phase transitions and static spin correlations in ising models with free surfaces[J].Phys Rev B,1972,6(9):3461-3487.
[4] PONIEWIERSKI A,SLUCKIN T J.Statistical mechanics of a simple of the nematic liquid crystal-wallinterface[J].Mol Cryst Liq Cryst,1984,111:373-386.
[5] LELIDIS I,DURAND G. Electric-field-induced isotropic-nematic phase transition[J].Phys Rev E,1993,48(5):3822-3824.
[6] 陆振荣,杨立.DSC法研究液晶物质2-(4-烷氧苯基)6-取代苯并噻唑的相变热性质[J].物理化学学报,1992,8(1):128-131.
[7] JEROME B. Surface effects and anchoring in liquid crystal[J].Rep Prog Phys,1991,54(3):391.
[8] SHENG P. Boundary-layer phase transition in nematic liquid crystals[J].Phys Rev A,1982,26(3):1610-1617.
[9] KRALJ S,ZUMER S,ALLENDER D W.Nematic-isotropic phase transition in a liquid-crystal droplet[J]. Phys Rev A,1991,43(6):2943-2952.
[10] FUKUDA J I, STARK H, YOKOYAMA H. Wetting of a spherical particle by a nematic liquid crystal[J]. Phys Rev E,2004,69(2):1714.
[11] KADIVAR E.Influence of the magnetic field on isotropic wetting behavior of a nematic liquid crystal[J].Phys Rev E,2008,78(3):1706.
[12] CAHN J W. Critical point wetting[J].J Chem Phys,1977,66(8):3667.

备注/Memo

备注/Memo:
收稿日期: 2012-09-25
通信作者: 曾明颖(1980-),女, 讲师,主要从事液晶物理性质的研究.E-mail:myingzeng@163.com.
基金项目: 国家自然科学基金资助项目(11005041); 福建省自然科学基金资助项目(2010J05007)
更新日期/Last Update: 2013-07-20