Structural, magnetic and optical properties of Ce substituted BiFeO3 nanoparticles

被引:58
作者
Arora, Manisha [1 ]
Kumar, Manoj [1 ]
机构
[1] Jaypee Inst Informat Technol, Dept Phys & Mat Sci & Engn, Noida 201307, India
关键词
Magnetic properties; Optical properties; Sol-gel; Structural properties; PHOTOCATALYTIC ACTIVITY; ELECTRIC POLARIZATION; DIELECTRIC-PROPERTIES; PHASE-TRANSITION; LA;
D O I
10.1016/j.ceramint.2014.12.155
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Ce substituted Bi1-xCexFeO3 (x=0.03, 0.05, 0.07 and 0.10) nanoparticles were prepared by a tartaric acid based sol-gel route. X-ray diffraction patterns and Raman spectra revealed a structural phase transition from rhombohedral to orthdrhombic phase for x=0.10 sample. Room temperature magnetic measurements showed weak ferromagnetic ordering and enhancement in magnetization with increasing Ce concentration. The improved magnetic properties due to the breaking of spin cycloid with Ce substitution have been observed from electron spin resonance (ESR) study. The measured g-values for all samples are greater than 2 and the ESR lines shift towards higher g-value with increasing Ce concentration, indicating ferromagnetic nature of these samples. UV visible diffuse reflectance spectra showed a sharp absorption in the visible region with two d-d and three charge transfer (C-T) transitions. Prominent red shift in the band gap indicates a significant change in the band structure of the doped nanoparticles. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
引用
收藏
页码:5705 / 5712
页数:8
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