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Magnetization of Bi0:9-xGdxLa0:1FeO3 System
Xue-qin Xu, Tian Qian, Tao-fei Zhou, Guang Li, Xiao-guang Li*
Hefei National Laboratory for Physical Sciences at Microscale, Department of Physics, University of Science and Technology of China, Hefei 230026, China
Abstract:
Magnetization of Bi0:9-xGdxLa0:1FeO3 (x=0.3, 0.5, 0.6 and 0.7) is reported. An abnormal negative magnetization appears in the temperature-dependent magnetization curves, and the temperature-dependent coercive field shows a maximum in the vicinity of the compensation temperature where the total magnetization is zero. These results suggest that in the ferrimagnetic-like Bi0:9-xGdxLa0:1FeO3 system the Gd and Fe magnetic sublattices are coupled antiferromagnetically.
Key words:  Multiferroic materials, Negative magnetization, Ferrimagnetic
FundProject:
Bi0:9-xGdxLa0:1FeO3的磁性
许雪芹, 钱天, 周桃飞, 李广, 李晓光*
中国科学技术大学物理系,合肥微尺度物质科学国家实验室, 合肥230026
摘要:
详细地研究了Bi0:9-xGdxLa0:1FeO3 (x=0.3,0.5,0.6和0.7)的磁化强度(M)和矫顽场随温度(T)的变化. 实验发现, 在一定温度范围内,M-T曲线上出现异常的负磁矩; 矫顽场与温度的关系不是单调变化的, 而是在温度补偿点到最大值. 这些结果表明Bi0:9-xGdxLa0:1FeO3体系中Gd和Fe磁晶格呈反铁磁耦合.但由于Gd离子和Fe离子的磁矩不相等,导致该体系中存在亚铁磁性.
关键词:  多铁性材料,负磁矩,亚铁磁性
DOI:10.1360/cjcp2007.20(1).1.4
分类号: