Dielectric relaxation in ultrathin ferroelectric Langmuir-Blodgett films of vinylidene fluoride and trifluorethylene copolymer
- 作者：K.A. Verkhovskaya ; A.S Ievlev ; A.M. Lotonov ; N.D. Gavrilova and V.M. Fridkin
- 关键词：Dielectric relaxation ; Langmuir-Blodgett films
- 刊名：Physica B
- 出版年：2005
- 期刊代码：53_09214526
- 类别：ph
- 出版时间：2005
- 卷：368
- 期：1-4
- 页码：105-108
- 文件大小：177 K
摘要
Debye-type dielectric relaxation has been revealed for the first time and investigated in the ferroelectric phase of ultrathin (15–45 nm) Langmuir-Blodgett (LB) films of vinylidene fluoride and trifluorethylene copolymer P[VDF–TrFE] with a first-order phase transition. The Cole–Cole plot of ε′ and ε″ and the relaxation time τ are investigated in a broad frequency and temperature range. The obtained results reveal a perfect crystalline structure of the ultrathin ferroelectric films.