Preparation and magnetic properties of RFeO3 nanocrystalline powders

被引:39
作者
Wu, Anhua [1 ]
Shen, Hui [1 ,3 ]
Xu, Jun [1 ]
Jiang, Linwen [1 ]
Luo, Liqing [1 ]
Yuan, Shujuan [2 ]
Cao, Shixun [2 ]
Zhang, Huaijin [4 ]
机构
[1] Chinese Acad Sci, Shanghai Inst Ceram, Shanghai 200050, Peoples R China
[2] Shanghai Univ, Dept Phys, Shanghai 200444, Peoples R China
[3] Shanghai Inst Technol, Sch Mat Sci & Engn, Shanghai 200235, Peoples R China
[4] Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China
关键词
Sol-gel; Combustion; Orthoferrites; Magnetic property; RARE-EARTH ORTHOFERRITES; LAFEO3;
D O I
10.1007/s10971-011-2474-z
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
The rare-earth orthoferrites RFeO3 (R, rare-earth element) crystallize in an orthorhombic distorted perovskite structure. RFeO3 compounds exhibit interesting physical and chemical properties because of their ionic and electronic defects. Polycrystalline nano-sized RFeO3 powders were synthesized by the sol-gel combustion method. X-ray powder diffraction indicated that nanocrystalline powders were single ReFeO3 phase, which are agglomerated with average crystallite size of 60-90 nm estimated with the Scherrer's equation. Magnetic measurements were carried out using a superconducting quantum interference device magnetometer. The influence on hysteresis curve of electronic structure of rare-earth element was investigated for R = Y, La and Nd. Varied magnetic behaviors were observed in these compounds, which are believed to be associated with the different interactions of Fe and rare earths.
引用
收藏
页码:158 / 163
页数:6
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