High electric tunability of relaxor ferroelectric Langmuir-Blodgett terpolymer films

被引：43
作者：
Wang, J. L. [1 ]
Meng, X. J. [1 ]
Yuan, S. Z. [1 ]
Yang, J. [1 ]
Sun, J. L. [1 ]
Xu, H. S. [2 ]
Chu, J. H. [1 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Tech Phys, Natl Lab Infrared Phys, Shanghai 200083, Peoples R China
[2] E China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 19期
基金：
上海市自然科学基金;
关键词：
ferroelectric thin films; Langmuir-Blodgett films; polymer blends; polymer films; polymer structure; relaxor ferroelectrics;
D O I：
10.1063/1.3026535
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Poly(vinylidene fluoride-trifluoroethylene-chlorofloroethylene) terpolymer films have been fabricated on Al-coated polyimide substrates using the Langmuir-Blodgett (LB) technology. The electrical properties of the films have been investigated from 150 to 350 K. The temperature of the dielectric maximum and the measured frequency obeys the Vogel-Fulcher [J. Am. Ceram. Soc. 8, 339 (1925); Phys. Z. 22, 645 (1921)] law. The electric tunabilities of the films at room temperature are 42.6% and 80% under 50 and 240 MV/m, respectively. The reasons for the high tunability are discussed based on the special microstructure of the LB films.
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页数：3
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