The effect of ac field amplitude on the relaxor behaviors in Langmuir-Blodgett terpolymer films

被引：11
|
作者：
Meng, X. J. [1 ]
Wang, J. L. [1 ]
Xu, H. S. [2 ]
Sun, J. L. [1 ]
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：
JOURNAL OF APPLIED PHYSICS | 2009年 / 106卷 / 11期
基金：
上海市自然科学基金;
关键词：
ferroelectric thin films; freezing; Langmuir-Blodgett films; permittivity; polymer films; relaxor ferroelectrics; ELECTROMECHANICAL PROPERTIES; PHASE-TRANSITIONS; SINGLE-CRYSTALS; FERROELECTRICS; TEMPERATURE; DEPENDENCE; VISCOSITY;
D O I：
10.1063/1.3267159
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The ac field (E-ac) amplitude dependence of dielectric response has been investigated for poly (vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) relaxor terpolymer films. The frequency dependence of the temperature of the permittivity maximum T-m can be well described by the Vogel-Fulcher relation for E-ac in the range from 1.33 to 80 MV/m. T-m remains nearly constant at an E-ac level lower than 13.3 MV/m, and starts decreasing with E-ac increases further. The two parameters fitting to the Vogel-Fulcher relation, freezing temperature T-f and activation energy E-a, vary little for E-ac below 26.7 MV/m and then T-f decreases, while E-a increases for higher E-ac level.
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页数：4
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