Enhancement of ferromagnetic properties in BiFeO3 polycrystalline ceramic by La doping

被引：198

作者：

Lin, Yuan-Hua ^{[1
]}

Jiang, Qinghui

Wang, Yao

Nan, Ce-Wen

Chen, Lin

Yu, Jian

机构：

[1] Tsinghua Univ, Dept Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China

[2] Univ Tokyo, Inst Solid State Phys, Chiba 02778581, Japan

[3] Tongji Univ, Funct Mat Res Lab, Shanghai 200092, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2007年 / 90卷 / 17期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1063/1.2732182

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The authors present the structure transformation and magnetic properties of Bi1-xLaxFeO3 (x=0.0-0.15) ceramics prepared by a conventional solid-state reaction processing. Magnetic measurements reveal that remnant magnetization of 15% La-doped BiFeO3 has enhanced about 20 times as compared to pure BiFeO3. It is the structural phase transition (R3c-C222) near x=0.15 that destructs the spin cycloid, and thus enhances the ferromagnetic properties significantly. In these Bi1-xLaxFeO3 ceramic samples, besides the known antiferromagnetic Neel temperature T-N1 similar to 615 K, another Neel temperature T-N2 similar to 260 K can be observed due to the trace impurity phase of Bi2Fe4O9 in these ceramic samples. (c) 2007 American Institute of Physics.

引用

页数：3

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