Structure and Magnetic Properties of CoFe2O4 Nanocrystal Thin Films Prepared by Sol-Gel Method


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Thin films of CoFe2O4 spinel ferrite were prepared on silicon (100) substrates at low temperature by means of a modified polyvinyl alcohol processing, and the structure and magnetic properties as a function of the only one varied calcination temperature were investigated in detail and optimized. The CoFe2O4 ferrite films had a single phase spinel structure and were well-crystallized at temperature above 600 °C, which is much lower than the required temperature in the traditional ceramic method (about 1000 °C). The films annealed at and above 500 °C for 1h showed the grain sizes between 9 and 40 nm, and exhibited high coercivities and high saturation magnetization. Co-ferrite films prepared by sol-gel method and annealed at 700 °C had excellent potential for important technological applications, such as information storage and magnetooptical devices.



Edited by:

Chengming Li, Chengbao Jiang, Zhiyong Zhong and Yichun Zhou






J. R. Sun et al., "Structure and Magnetic Properties of CoFe2O4 Nanocrystal Thin Films Prepared by Sol-Gel Method", Materials Science Forum, Vol. 687, pp. 756-758, 2011

Online since:

June 2011




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