Thickness Dependence of Ferroelectricity in Langmuir-Blodgett Multilayer Films of Hemicyanine Dyes

被引：0
|
作者：
Liu, Lin [1 ]
Li, Shuhong [1 ]
Li, Bo [1 ]
Ma, Shihong [1 ]
机构：
[1] Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China
来源：
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2012年 / 12卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Langmuir-Blodgett Films; Ferroelectricity; Hysteresis Loop; Coercive Field; Optimum Value;
D O I：
10.1166/jnn.2012.5341
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The thickness dependence of ferroelectricity in hemicyanine Langmuir-Boldgett multilayer films was reported in this paper. By the observed ferroelectric hysteresis loop, it was found that the coercive field decreased with increasing of film thickness monotonously and may be approximated by a power law Ec proportional to N-4/3 in the range from 30 to 200 nm, which is consistent with other conventional ferroelectric materials. The measurement of dielectric properties give the optimum thickness about 60 nm of hemicyanine LB films and their optimum value as ferroelectric storage-devices has the same order of magnitude as copolymer's P(VDF-TrFE) (70:30 mol%).
引用
收藏
页码：680 / 684
页数：5
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