BiFeO_3-Bi(Ti_(0.5)Ni_(0.5))O_3固溶体陶瓷的多铁性能研究  

Improved Multiferroic Properties of BiFeO_3-Bi(Ti_(0.5)Ni_(0.5))O_3 Solid Solution Ceramics

作　　者：马争争[1] 李建青[1] 胡晓军[1] 陈子鹏[1] 余灵风 

机构地区：[1]武汉理工大学理学院,武汉430070

出　　处：《武汉理工大学学报》2013年第12期11-14,38,共5页Journal of Wuhan University of Technology

摘　　要：采用溶胶-凝胶法制备了系列(1-x)BiFeO3-xBi(Ti0.5Ni0.5)O3固溶体陶瓷,研究了不同组分下样品的结构和铁电、铁磁及介电性能。X射线衍射谱显示出样品具有纯相的菱方钙钛矿结构。与纯BFO陶瓷相比,固溶体陶瓷样品的剩余磁化(Mr)和剩余极化(Pr)都有明显的提高。其中x=0.1的样品能观察到饱和的磁滞回线,并表现出最佳的磁电性能,具有最大的剩余磁化Mr=0.565 31emμ/g和最大的剩余极化Pr=5.767μC/cm2。通过测量样品介电常数随温度变化的关系曲线,观察到铁电相变与铁磁性相变发生的介电异常峰,并显示出样品的损耗和漏电流大幅度降低。The structural,magnetic and ferroelectric properties of the （1-x）BiFeO3-xBi（Ti0.5Ni0. 5）O3 （x=0,0. 1, 0. 2,0.3） solid solutions synthesized by a modified Pechini method are investigated. The X-ray diffraction patterns confirm the single phase character of all the compositions with rhombohedral structure. Compared with pure BiFeO3 compound, both ferroelectric and magnetic properties are much improved by solid solution with Bi（Ti0.5 Ni0. 5 ）O3 with saturation hys-teresis loops observed. Among all the samples, the x = 0. 1 sample shows the optimal ferromagnetism with Mr = 0. 565 31 emtμ/g and the optimal ferroelectricity with Pr = 5. 767 μC/cm^2 at room temperature.

关 键 词：BIFEO3 多铁 室温铁电 室温磁性 

分 类 号：O482.52[理学—固体物理]