Dielectric dispersion in Langmuir-Blodgett ferroelectric polymer films

被引：12
作者：
Lotonov, A. M.
Ievev, A. S.
Gavrilova, N. D.
Verkhovskaya, K. A.
Yudin, S. G.
机构：
[1] Moscow MV Lomonosov State Univ, Moscow 119992, Russia
[2] Russian Acad Sci, Shubnikov Inst Crystallog, Moscow 119333, Russia
来源：
PHYSICS OF THE SOLID STATE | 2006年 / 48卷 / 06期
基金：
俄罗斯基础研究基金会;
关键词：
D O I：
10.1134/S1063783406060485
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The dynamic permittivity of vinylidene fluoride-trifluoroethylene (70: 30) copolymer films is measured over wide ranges of frequencies and temperatures. It is revealed that 15- to 45-nm-thick Langmuir-Blodgett films of the vinylidene fluoride-trifluoroethylene copolymer undergo a Debye-type dielectric relaxation. The relaxation time tau increases as the temperature increases and the ferroelectric phase transition is approached. This effect is interpreted as a result of critical slowing down. The influence of gamma irradiation on the dielectric response of Langmuir-Blodgett films consisting of 10 and 30 monolayers is investigated.
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收藏
页码：1171 / 1173
页数：3
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