Structure, ferroelectric properties, and magnetic properties of the La-doped bismuth ferrite

被引：302

作者：

Cheng, Z. X. ^{[1
]}

Li, A. H. ^{[1
]}

Wang, X. L. ^{[1
]}

Dou, S. X. ^{[1
]}

Ozawa, K. ^{[2
]}

Kimura, H. ^{[2
]}

Zhang, S. J. ^{[3
]}

Shrout, T. R. ^{[3
]}

机构：

[1] Univ Wollongong, Inst Superconducting & Elect Mat, Wollongong, NSW 2522, Australia

[2] Natl Inst Mat, Tsukuba, Ibaraki, Japan

[3] Penn State Univ, Mat Res Inst, University Pk, PA 16802 USA

来源：

JOURNAL OF APPLIED PHYSICS | 2008年 / 103卷 / 07期

关键词：

D O I：

10.1063/1.2839325

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Bi1-xLaxFeO3 ceramics with x=0, 0.1, 0.2, and 0.3 have been synthesized by solid state reaction, starting from metal oxides. A series of structure transformations is found to depend upon the doping level. Below 10% La doping, Bi1-xLaxFeO3 maintains the rhombohedral structure of BiFeO3. However, for Bi0.8La0.2FeO3 and Bi0.7La0.3FeO3, the structures change to the orthorhombic and tetragonal, respectively. La doping significantly reduces electric leakage and leads to successful observation of electrical polarization hysteresis loops. Doping with La also enhances the ferromagnetic moment, due to the broken cycloid spin structure caused by the changes in the crystalline structure. (C) 2008 American Institute of Physics.

引用

页数：3

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