铁电薄膜热释电性质的研究  

Studies on the pyroelectric properties of ferroelectric bilayer film

作　　者：张芹[1] 董亚男[1,2] 陈红[1] 

机构地区：[1]北华大学物理学院,吉林吉林132033 [2]长春教育学院理化生系,吉林长春130061

出　　处：《东北师大学报（自然科学版）》2013年第1期88-92,共5页Journal of Northeast Normal University(Natural Science Edition)

基　　金：吉林省科技发展计划项目(201205035)

摘　　要：利用Ginzburg-Landau-Devonshire(GLD)热力学唯象理论,对由2种不同铁电材料构成的含有表面过渡层的铁电双层膜体系进行了探讨.通过引入一个描述2种铁电材料物理性能差异大小的物理参量α,并考虑2种铁电材料物理性能的差异,研究了铁电双层膜的热释电性质.结果表明:通过控制参量α的大小,热释电曲线上会呈现1个或2个峰;改变铁电界面耦合系数、参量α以及表面过渡层参量的大小,热释电曲线的峰位向高温区或低温区移动.Using Ginzburg-Landau-Devonshire theory, a ferroelectric bilayer film consisting of two different ferroelectric constituent films with the transition layer within each constituent film is considered. Introduced a parameter,which described the differences of physical properties between two constituent films, to investigate the temperature dependence of the pyroelectric coefficient of the bilayer film. It is shown that one or two peaks can be obtained in the pyroelectric curve by the adjustment of parameter a. The modification of ferroelectric interracial coupling cofficient,parameter a and surficial transition layer parameter leads to the peaks of the pyroelectric curve shifting to the higher or lower temperature region.

关 键 词：铁电薄膜 GLD理论 表面过渡层 热释电系数 

分 类 号：O484[理学—固体物理]