SYNTHESIS OF NANOCRYSTALLINE NICKEL-ZINC FERRITE BY THE SOL-GEL METHOD

被引：153

作者：

CHATTERJEE, A ^{[1
]}

DAS, D ^{[1
]}

PRADHAN, SK ^{[1
]}

CHAKRAVORTY, D ^{[1
]}

机构：

[1] INDIAN ASSOC CULTIVAT SCI,CALCUTTA 700032,W BENGAL,INDIA

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1993年 / 127卷 / 1-2期

关键词：

D O I：

10.1016/0304-8853(93)90217-P

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ni0.5Zn0.5Fe2O4 crystals having dimensions varying from 13 to 35 nm have been synthesized within a silica glass matrix by a sol-gel method. Particle sizes in the above range can be controlled by a suitable heat treatment schedule at temperatures varying from 973 to 1323 K. The coercivity values for different heat-treated samples are found to be in the range 20-95 Oe, which are significantly larger than that for samples having grain sizes of the order of a few microns. The Mossbauer spectra of the samples show the presence of ultrafine particles exhibiting superparamagnetic relaxation.

引用

页码：214 / 218

页数：5

共 14 条

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