Pb离子掺杂多铁性材料BiFeO_3的铁电性研究  

Research of Room-temperature Ferroelectric Properties for the Pb Doped BiFeO_3

作　　者：汪帅[1] 李坤芳[1] 方婷[1] 王舒民[1] 周小洪[1] 苏宇[2] 张玉亮[3] 李永涛[1] 李兴鳌[1] 

机构地区：[1]南京邮电大学理学院,南京210023 [2]南京邮电大学通信与信息工程学院,南京210023 [3]南京邮电大学物联网学院,南京210023

出　　处：《材料导报（纳米与新材料专辑）》2014年第2期237-239,共3页

基　　金：国家自然科学基金(51372119;51172110);校科研项目(NY213124);大学生创新创业训练计划支持

摘　　要：利用溶胶-凝胶方法成功制备Pb掺杂Bi1-xPbxFeO3(x=0.05,0.15)多铁性样品,并对样品的晶体结构、表面形貌、铁电性以及漏电流进行测量和研究。XRD结果表明,随着Pb离子掺杂浓度的增加,样品没有发生结构相变,仍然属于斜方六面体结构。铁电性测试显示Pb离子掺杂的BiFeO3样品具有很好的室温铁电性,漏电流曲线表明Pb离子掺杂并不能很好地抑制漏电流的产生。Multiferroic samples Bi1-xPbxFeO3 （x= 0. 05,0. 15） were successfully prepared by sol-gel method. The crystal structure, surface morphologies, ferroelectric properties and leakage current of samples were also measured and investigated. X-ray diffraction experiment data indicate that the behavior of phase transition of the sample does not occur. They all belong to rhombohedral structure, with the increasing of doping amounts of Pb ion. Moreover, the samples have good ferroelectric properties according to the ferroelectric hysteresis loops of samples. In addition, the leakage current curve shows that Ph ion doping has no help to leakage current＇s decrease.

关 键 词：多铁性材料 铁电性 电滞回线 漏电流 

分 类 号：O469[理学—凝聚态物理]