Analysis of exchange bias effect of NiO + NiFe2O4 composites

被引：5
|
作者：
He, J. H. [1 ]
Yuan, S. L. [1 ]
Yin, S. Y. [1 ]
Liu, K. L. [1 ]
Li, P. [1 ]
Wang, C. H. [1 ]
Liu, L. [1 ]
Li, J. Q. [1 ]
Tian, Z. M. [1 ]
机构：
[1] Huazhong Univ Sci & Technol, Dept Phys, Wuhan 430074, Peoples R China
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2010年 / 322卷 / 01期
关键词：
Composite material; Magnetic property; Exchange bias; Interfacial effect; MAGNETIC ANISOTROPY; NANOPARTICLES;
D O I：
10.1016/j.jmmm.2009.08.032
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Exchange bias (EB) and magnetic properties of ferrimagnetic (FI) NiFe2O4 and anti ferromagnetic (AFM) NiO bulk composites, prepared by a chemical co-precipitation and post-thermal decomposition method from Fe-doped NiO matrix, have been investigated. Enhanced coercivities and shifted hysteresis loops are still observed for these samples after field cooling. But the vertical magnetization shifts are not observed. In comparison with the bulk samples, a NiO/10% NiFe2O4 nanocomposite was also prepared via direct mixture, in which both the horizontal and vertical shift in the hysteresis loops are observed at 10 K. The observed phenomena are explained in terms of interfacial exchange interaction between the two phases and the finite-size effect, respectively. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：79 / 83
页数：5
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