辽宁工程技术大学学报（自然科学版）2012，Vol.31Issue(4)：548-551,4.
梯度铁电薄膜热释电性质的理论研究
Theoretical investigation on the pyroelectric properties of graded ferroelectric thin films
摘要
Abstract
In order to investigate the theoretical method to improve the pyrocltctric properties of ferroelectric thin films, a theoretical model for component-graded ferroelectric thin films is developed in this study. In the framework of the thermodynamic theory, a distribution function is introduced to characterize the properties of graded components. With the variation of parameter a and the external electric field, the pvroelectric properties of componerrt-greded ferroelectric thin films are mainly investigated. The study shows that the component gradient leads to the graded-polarization distribution in films. The parameter a and the external electric field are two main factors affecting the films properties, which have obvious impact on pyroelectric working temperature region and pyroelecttic detective insensitivity. The resulls provide a theoretical reference for the preparation and applications of pyroelectic apparatus.关键词
铁电薄膜/组分梯度/相变温度/热释电系数/唯象理论/分布函数/电场强度/自发极化Key words
ferroelectric thin film/ component gradient/ phase transition temperature/ pyroelectric coefficient/ phenomenological theory/ distribution function/ electric filed intensity/ spontaneous polarization分类
数理科学引用本文复制引用
陈辉,成泰民,陈思群..梯度铁电薄膜热释电性质的理论研究[J].辽宁工程技术大学学报（自然科学版）,2012,31(4):548-551,4.基金项目
国家自然科学基金资助项目(10647138) （10647138）
辽宁省科研基金资助项目(20060667) （20060667）
