Magnetic properties of Ni-substituted BiFeO3

被引：18
|
作者：
Dai, Y. R. [1 ]
Xu, Qingyu [1 ]
Zheng, Xiaohong [1 ]
Yuan, Shijun [1 ]
Zhai, Ya [1 ]
Xu, Mingxiang [1 ]
机构：
[1] Southeast Univ, Dept Phys, Nanjing 211189, Jiangsu, Peoples R China
来源：
PHYSICA B-CONDENSED MATTER | 2012年 / 407卷 / 03期
基金：
中国国家自然科学基金; 美国国家科学基金会;
关键词：
Multiferroic; BiFeO3; Ferromagnetism; BISMUTH FERRITE; CERAMICS; FILMS;
D O I：
10.1016/j.physb.2011.11.055
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
BiFe1-xNi3O3 ceramic powders with x up to 0.10 have been prepared by the sol-gel technique. The band gap of BiFeO3 is 2.23 eV, and decreases to 2.09 eV for BiFe0.95Ni0.05O3 and BiFe0.90Ni0.10O3. The Mossbauer spectra show sextet at room temperature, indicating the magnetic ordering and the presence of only Fe3+ ions. Superparamagnetism with blocking temperature of 31 K for BiFe0.95Ni0.05O3 and 100 K for BiFe0.90Ni0.10O3 was observed. Enhanced magnetization at room temperature have been observed ;(1.0 emu/g for BiFe0.95Ni0.05O3 and 2.9 emu/g for BiFe0.90Ni0.10O3 under magnetic field of 10,000 Oe), which is one order larger than that of BiFeO3 (0.1 emu/g under magnetic field of 10,000 Oe). The enhanced magnetization was attributed to the suppression of the cycloidal spin structure by Ni3+ substitution and the ferrimagnetic interaction between Fe3+ and Ni3+ ions. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：560 / 563
页数：4
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