Effects of Nd and high-valence Mn co-doping on the electrical and magnetic properties of multiferroic BiFeO3 ceramics

被引：125
作者：
Hu, Zhongqiang [1 ,2 ]
Li, Meiya [1 ,2 ]
Yu, Yang [1 ,2 ]
Liu, Jun [1 ,2 ]
Pei, Ling [1 ,2 ]
Wang, Jing [1 ,2 ]
Liu, Xiaolian [1 ,2 ]
Yu, Benfang [3 ]
Zhao, Xingzhong [1 ,2 ]
机构：
[1] Wuhan Univ, Dept Elect Sci & Technol, Sch Phys Sci & Technol, Wuhan 430072, Peoples R China
[2] Wuhan Univ, Key Lab Acoust & Photon Mat & Device, Minist Educ, Wuhan 430072, Peoples R China
[3] Huazhong Univ Sci & Technol, Dept Phys, Wuhan 430075, Peoples R China
来源：
SOLID STATE COMMUNICATIONS | 2010年 / 150卷 / 23-24期
基金：
中国国家自然科学基金;
关键词：
Multiferroics; Ceramics; Electrical and magnetic properties; POLARIZATION;
D O I：
10.1016/j.ssc.2010.03.015
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Pure BiFeO3 (BFO), 15% Nd doped BFO (BNF), and 15% Nd and 2% high-valence Mn co-doped BFO (BNFM) multiferroic ceramics were prepared by a rapid liquid phase sintering technique. A structural transition from rhombohedral R3c to orthorhombic P4mm occurred in the BNF and BNFM ceramics. The co-doped BNFM ceramics exhibit the largest dielectric constant, the smallest dielectric loss and leakage current, and an improved rectangular-shaped polarization hysteresis loop with a remnant polarization as high as 31 mu C/cm(2), which could be attributed to the lower concentration of charge defects and the structural transition. Besides, enhanced ferromagnetism is confirmed in BNFM with a remnant magnetization of 0.075 emu/g and a coercive magnetic field of 5.8 kOe, which might be attributed to the effective suppression of the spatially modulated spin structure by the Nd and Mn co-doping. (C) 2010 Elsevier Ltd. All rights reserved.
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收藏
页码：1088 / 1091
页数：4
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