Structural and Magnetic Properties of Bi(Fe1-xMnx)O3
- Received Date: 2011-11-27
Abstract: Bi(Fe1-xMnx)O3 bulk ceramics with Mn concentration x up to 0.3 were prepared by rapid sintering using sol-gel derived fine powders. Structure transformation is found to depend on the Mn doping concentration by X-ray diffraction and Raman spectroscopy. Bi(Fe1-xMnx)O3 maintains the rhombohedral structure of BiFeO3 with x=0.05 and 0.1, but changes to the orthorhombic structure with x=0.3. Weak ferromagnetism is observed for Bi(Fe1-xMnx)O3 with x=0.05 and 0.1, but stronger paramagnetism is observed for Bi(Fe1-xMnx)O3 with x=0.3 indicating a magnetic phase change from antiferromagnetic to paramagnetic with the structure changing from R3c to C222. Two anomalies at 30 and 140 K are observed for Bi(Fe1-xMnx)O3 with x=0.05 and 0.1. The anomaly at 30 K is concluded to be related to the freezing of cluster spin glass from dc magnetic memory and relaxation measurements.
|Citation:||Bin-feng Ding. Structural and Magnetic Properties of Bi(Fe1-xMnx)O3[J]. Chinese Journal of Chemical Physics , 2012, 25(2): 204-208. doi: 10.1088/1674-0068/25/02/204-208|