Eu离子掺杂BiFeO_3的多铁性及Raman谱研究  

Studies of Multiferroics and Raman Spectra for Eu-doped BiFeO_3

作　　者：李永涛[1] 滕晓雪 汪帅[1] 李坤芳[1] 方婷[1] 李兴鳌[1] 

机构地区：[1]南京邮电大学理学院,南京210046 [2]南京邮电大学通信与信息工程学院,南京210046

出　　处：《材料导报》2013年第24期1-3,共3页Materials Reports

基　　金：国家自然科学基金(51172110);江苏省自然科学基金(BK2010525);南京邮电大学科研项目(NY212099);大学生创新创业训练计划支持

摘　　要：利用溶胶-凝胶法成功制备了BiFeO3和Bi0.95Eu0.05FeO3粉末样品,并讨论了温度和Bi离子的含量对样品制备的影响。铁电性和磁性测量显示:与BiFeO3样品相比,稀土(Eu)离子掺杂的BiFeO3样品的磁性和铁电性有很大提高。Raman谱数据分析得出,Eu离子掺杂引起了BiFeO3样品的局域结构的改变。Eu离子掺杂促使BiFeO3样品的磁性提高归因于局域结构改变导致了BiFeO3样品中的自旋轮摆结构的破坏,最终使样品的磁性提高。BiFeO3 and Bio. 95 Eu0. 05 FeO3 powders were successfully prepared by a sol-gel method. Effect of tem- perature and the amount of Bi ions on sample preparation was investigated. It was found that the magnetic and ferroe- lectric properties of Eu-doped BiFeOa sample improve significantly with respect to pure BiFeO3 through ferroelectric and magnetic measurements. The data analysis of Raman spectra showed that Eu ion doping causes changes in the lo- cal structure of the BiFeO3 sample. The increase of BiFeO3 samplers magnetism through Eu ion doping can be attribu- ted to the destruction of spinning wheel pendulum structure caused by local structural change in the BiFeO3 samples.

关 键 词：多铁性材料铁电性磁性拉曼谱 

分 类 号：O469[理学—凝聚态物理]