Effect of annealing temperature on the magnetic properties of CoFe2O4 nanoparticles

被引：28
作者：
El-Dek, S. I. [1 ]
机构：
[1] Cairo Univ, Fac Sci, Dept Phys, Mat Sci Lab 1, Giza, Egypt
来源：
PHILOSOPHICAL MAGAZINE LETTERS | 2010年 / 90卷 / 04期
关键词：
nanostructures; magnetically ordered materials; CoFe2O4; flash method; saturation magnetization; coercivity; COBALT FERRITE NANOPARTICLES; COMBUSTION SYNTHESIS; SPINEL; RELAXATION; SIZE;
D O I：
10.1080/09500831003630732
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Nanocrystalline CoFe2O4 samples were prepared using the flash technique and annealed at different temperatures. X-ray diffraction results indicate a single-phase spinel structure. The saturation and remanent magnetization of the samples have been determined as a function of the crystallite size. An exponential decay of the coercive field with crystallite size is observed. After annealing, one of the samples at 950 degrees C, 40nm particles were obtained with a saturation magnetization of 64.36 emu/g, a coercivity of 396 Oe and the highest density among all the samples.
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收藏
页码：233 / 240
页数：8
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