摘要
BiFeO_(3)是一种在室温下同时存在铁电性和铁磁性的多铁性材料。采用溶胶-凝胶法制备了Bi_(1⁃x)La_(x)FeO_(3)粉体,研究了La的含量和烧结温度对Bi_(1⁃x)La_(x)FeO_(3)晶体结构、晶粒尺寸和电磁性能的影响。结果表明,随着La含量的增加,Bi_(1⁃x)La_(x)FeO_(3)晶格常数先增大后减小;La含量达到20%时,发生结构相变;La和Bi均可抑制Bi_(1⁃x)La_(x)FeO_(3)晶粒的生长;随着La含量的增加,Bi_(1⁃x)La_(x)FeO_(3)的矫顽力和剩磁先增大后减小,La的含量为60%时达到最大值。
BiFeO_(3)is a kind of multiferroic material with ferroelectricity and ferromagnetism at room temperature.In this paper,Bi_(1⁃x)La_(x)FeO_(3)powders were prepared by sol⁃gel method.The effects of doping of La and sintering temperature on the crystal structure,grains size and magnetism of Bi_(1⁃x)La_(x)FeO_(3)were investigated.The results showed that crystal constant of Bi_(1⁃x)La_(x)FeO_(3)increases firstly and then decreases with the increase of La content.The phase of Bi_(1⁃x)La_(x)FeO_(3)changes when doped La is 20%.Besides,both La and Bi can inhibit the crystal growth of Bi_(1⁃x)La_(x)FeO_(3).The coercivity and the remanent magnetiza⁃tion of Bi_(1⁃x)La_(x)FeO_(3)increase firstly then decrease with the increase of La and reach the maximum when doped La is 60%.
作者
黄欣
李新
谢紫凌
丁茹
王森
刘高斌
HUANG Xin;LI Xin;XIE Zi-lin;DING Ru;WANG Sen;LIU Gao-bin(School of Materials&Metallurgy,University of Science and Technology Liaoning,Anshan 114051,China)
出处
《稀土》
CAS
CSCD
北大核心
2023年第5期137-142,共6页
Chinese Rare Earths
基金
辽宁省科技厅项目(20180550373)
大学生创新创业项目(101462019107)。
关键词
多铁性
溶胶-凝胶法
磁滞回线
multiferroics
sol⁃gel method
magnetic hystersis loop
作者简介
黄欣(1999⁃),女,辽宁锦州人,硕士研究生,主要从事电子功能材料的研究,E⁃mail:xhua@ustl.edu.cn;通讯作者:刘高斌,博士,讲师,E⁃mail:gbliu@ustl.edu.cn。
