多铁性
磁化
铁磁性
居里温度
晶体结构
单晶
反铁磁性
Crystal(编程语言)
磁性结构
磁各向异性
四方晶系
作者
Peter M. Fischer,M Polomska,Izabela Sosnowska,M Szymanski
出处
期刊:Journal of Physics C: Solid State Physics
[IOP Publishing]
日期:1980-04-10
卷期号:13 (10): 1931-1940
被引量:823
标识
DOI:10.1088/0022-3719/13/10/012
摘要
The temperature dependence of structural and magnetic order parameters of ferroelectric-antiferromagnetic BiFeO3 with rhombohedral perovskite structure is investigated by means of neutron diffraction on a powder sample. The tilt angle of oxygen octahedra decreases from 12.5 degrees at 4.2K to 11.4 degrees at 878K. Associated with ferroelectricity the cation displacements diminish essentially with increasing temperature. Changes of cation shifts, tilt angle, distortion and strain of octahedra are discussed with respect to phase transitions.
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