双元共掺杂Bi_(1-x)La_x(Fe_(0.95)Mn_(0.05))O_3多铁性材料的磁性研究  

The Magnetic Properties Researches of the Binary Elements Codoped Bi_(1-x)La_x(Fe_(0.95)Mn_(0.05))O_3 Multiferroic Materials

作　　者：李永涛[1] 周小洪[1] 王舒民[1] 王慧娜[1] 王鑫[1] 张庆强[1] 苏宇[2] 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

出　　处：《材料导报》2014年第18期1-4,共4页Materials Reports

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

摘　　要：采用溶胶-凝胶法制备了Bi1-xLax(Fe0.95Mn0.05)O3(x=0,0.10,0.15)多晶样品。X射线衍射实验表明La、Mn离子共掺杂没有改变样品的四方晶格结构。X射线能量色散分析显示样品的化学组分几乎不变。Mn离子掺杂或者是(La、Mn)离子共掺杂,导致铁酸铋材料的磁性增强。X射线吸收精细结构实验表明Mn3+的局域结构的改变是样品磁性增强的原因。Polycrystalline samples Bi1-xLax （Fe0.95 Mn0.05）O3 （x=0,0.10,0.15） were successfully prepared by a sol-gel method.X-ray diffraction experiment shows that （La,Mn）-codoped ions do not change the square lattice structure feature of the sample.X-ray energy dispersive analysis indicates chemical composition of the sample is not changed.For the bismuth ferrite sample,Mn-doping or （La,Mn）-codoping can make the magnetic properties increase.X-ray absorption fine structure experiment demonstrates that magnetic properties enhancement of these samples derive its origin from the change of the local structure around Mn^3＋ ions.

关 键 词：多铁性材料 磁性 X射线能量色散谱 X射线吸收精细结构 

分 类 号：O469[理学—凝聚态物理]