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Structural, Magnetic and Optical Properties of BiFe1-xNbxO3
Hui-min Xian,Yi-quan Du,Jiang Zhang,Xi Chen
Author NameAffiliationE-mail
Hui-min Xian Department of Physics, South China University of Technology, Guangzhou 510006, China  
Yi-quan Du Department of Physics, South China University of Technology, Guangzhou 510006, China  
Jiang Zhang Department of Physics, South China University of Technology, Guangzhou 510006, China  
Xi Chen Department of Physics, South China University of Technology, Guangzhou 510006, China xichen@scut.edu.cn 
Abstract:
Nb doped multiferroic BiFe1-xNbxO3 (0 <x <0.05) polycrystalline powders have been syn-thesized by using a sol-gel method. The effect of Nb dopant on the structural, magnetic and optical properties is investigated. According to the X-ray di raction data and the result of Rietveld re nement, all the samples maintain the R3c phase, while the lattice parameters a, c, the cell volume V and the Fe-O-Fe bond angle change. The remnant magnetization enhances by appropriate Nb doping due to the decreasing of the grain size. Meanwhile, Nb dopant leads to the narrowing of the band gap of BiFe1-xNbxO3 samples.
Key words:  Bismuth ferrite  Crystal structure  Magnetic property  Band gap
FundProject:
BiFe1-xNbxO3的结构、磁性和光学性质
冼慧敏,杜奕全,张弜,陈熹
摘要:
用溶胶凝胶法制备了Nb掺杂多铁BiFe1-xNbxO3粉晶样品(0 <x <0.05),研究Nb掺杂对样品的结构、磁学和光学性质的影响。根据XRD图谱和Rietveld精修的结果可知,所有的样品仍保持R3c相,但晶格常数ac,晶胞体积V和Fe-O-Fe键角发生变化。适当的Nb掺杂使得样品晶粒尺寸减小,导致剩余磁化强度的增强,使得BiFe1-xNbxO3样品的禁带窄化.
关键词:  铁酸铋  晶体结构  磁学性质  带隙
DOI:10.1063/1674-0068/29/cjcp1603061
分类号: