Sol-gel derived multiferroic BiFeO3 ceramics with large polarization and weak ferromagnetism

被引：88

作者：

Chen, F.

Zhang, Q. F.

Li, J. H.

Qi, Y. J.

Lu, C. J. ^{[1
]}

Chen, X. B.

Ren, X. M.

Zhao, Y.

机构：

[1] Hubei Univ, Dept Mat Sci & Engn, Wuhan 430062, Peoples R China

[2] Yangzhou Univ, Coll Phys Sci & Technol, Yangzhou 225002, Peoples R China

[3] SW Jiaotong Univ, Supercond R&D Ctr, Chengdu 610031, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2006年 / 89卷 / 09期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1063/1.2345603

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Insulating BiFeO3 ceramics of single perovskite phase were prepared by rapid sintering using sol-gel derived fine powders. The ceramics are dense and consist of grains of 2-6 mu m in diameter. Their leakage current density remains lower than 3.02x10(-4) A/cm(2) under the poling field below 119 kV/cm. The main conduction mechanism from 15 to 119 kV/cm is space-charge-limited current relating to oxygen vacancies. The ceramics exhibit a saturated ferroelectric hysteresis loop with a large remanent polarization (2P(r)=56 mu C/cm(2)) under the applied field of 180 kV/cm. Weak ferromagnetism with remanent magnetization of 1.5x10(-5)mu(B)/Fe is observed at 10 K. (c) 2006 American Institute of Physics.

引用

页数：3

共 19 条

[1] PREPARATION OF SINGLE-PHASE POLYCRYSTALLINE BIFEO3 [J].