Synthesis and magnetic properties of cobalt ferrite (CoFe2O4) nanoparticles prepared by wet chemical route

被引：816
|
作者：
Maaz, K.
Mumtaz, Arif [1 ]
Hasanain, S. K.
Ceylan, Abdullah
机构：
[1] Quaid I Azam Univ, Dept Phys, Islamabad, Pakistan
[2] Univ Delaware, Dept Phys & Astron, Newark, DE USA
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2007年 / 308卷 / 02期
关键词：
ferrite nanoparticles; surface anisotropy; high coercivity magnetic materials;
D O I：
10.1016/j.jmmm.2006.06.003
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Magnetic nanoparticles of cobalt ferrite have been synthesized by wet chemical method using stable ferric and cobalt salts with oleic acid as the surfactant. X-ray Diffraction (XRD) and Transmission Electron Microscope (TEM) confirmed the formation of single-phase cobalt ferrite nanoparticles in the range 15-48 urn depending on the annealing temperature and time. The size of the particles increases with annealing temperature and time while the coercivity goes through a maximum, peaking at around 28 run. A very large coercivity (10.5 kOe) is observed on cooling down to 77 K while typical blocking effects are observed below about 260 K. The high field moment is (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：289 / 295
页数：7
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