铁电微分回线谱参数和极化疲劳  

Differential Hysteresis Loop of Ferroelectrics and Polarization Fatigue

作　　者：陈敏[1] 朱贵文[2] 周伟华[3] 沈韩[1] 李景德[1] 

机构地区：[1]中山大学 物理科学与工程技术学院,广州510275 [2]广东药学院 物理教研室,广州510224 [3]宜春学院 物理系,宜春336000

出　　处：《无机材料学报》2007年第3期461-464,共4页Journal of Inorganic Materials

基　　金：广东省自然科学基金(04009806);广东省自然科学基金(博士启动基金)(05300580)

摘　　要：用铁电微分回线谱分析方法研究了Ba0.99Sr0.01TiO3陶瓷的极化疲劳效应,该方法可将线性和非线性电导、非铁电极化电容、以及纯铁电极化信号完全分开．实验给出各效应对应的微分谱线型参数在疲劳过程中的变化规律,并据此分出样品中分别由180°畴和90°畴提供的极化,发现在同等作用下,180°畴提供的极化更快出现疲劳．By means of ferroelectric differential hysteresis loop spectra, the polarization fatigue of Bao.99Sr0.01TiO3 ceramics was carefully studied. The effects of conductance, paraelectrics and pure ferroelectrics could be definitely separated. The results show that the polarization fatigue arose from 180° domain appears much faster than that arose from 90° domain. Ferroelectric differential loop spectra are proved to be a much more powerful method to describe polarization fatigue than traditional hysteresis loop.

关 键 词：铁电性 疲劳 微分回线 钛酸锶钡 

分 类 号：O482[理学—固体物理] TN304[理学—物理]