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

页码：289 / 295

页数：7

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