Field induced modification of SmC*-SmCA* transition temperature of a fluorinated antiferroelectric liquid crystal

被引：6
作者：
Bhattacharyya, Suriya Sarathi [2 ]
Rahman, M. [2 ]
Mukherjee, A. [2 ]
Wu, S. L. [3 ]
Chaudhuri, B. K. [1 ,2 ]
机构：
[1] Natl Sun Yat Sen Univ, Dept Phys, Kaohsiung 804, Taiwan
[2] Indian Assoc Cultivat Sci, Dept Solid State Phys, Kolkata 700032, India
[3] Tatung Univ, Dept Chem Engn, Taipei 104, Taiwan
来源：
CURRENT APPLIED PHYSICS | 2009年 / 9卷 / 02期
关键词：
Ferroelectricity and antiferroelectricity; Dielectric loss and relaxation; Domain structure; DIELECTRIC-RELAXATION; THRESHOLDLESS ANTIFERROELECTRICITY; FRUSTRATED PHASE; BEHAVIOR; MODES;
D O I：
10.1016/j.cap.2008.03.012
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The temperature and frequency dependent dielectric relaxation data and simultaneous observation of optical texture reveal co-existence of ferroelectric (SrnC*) and antiferroelectric (SmCA*) phases in the pre-transition regime of the anti ferroelectric liquid crystal (AFLC) sample viz. (R)-4-[1-methyl-2-(2,2,3,3,3-pentafluoropropyloxy)ethyloxy)carbonyl]phenyl 4'-decyloxybiphenyl-4-caboxylate. Interestingly, this sample shows irreversible change in the antiferroelectric to ferroelectric (AFE -> FE) phase transition temperature (TO) for consecutively increasing bias field treatment in successive cycles. The lowest upper bound of the threshold field for AFE -> FE transition at the boundary of the said phases is found to be similar to 1 kV cm(-1). (C) 2008 Elsevier B.V. All rights reserved.
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页码：390 / 395
页数：6
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