High Coercivity of Co-Ferrite Thin Films Prepared by Sol-Gel Method

Magnetic properties related to nano-structure have been investigated for sol-gel grown spinel Co-ferrite thin films of which thickness was 200-300 nm controlled by spin coating. The magnetic properties depended on the annealing temperature, and the coercivity of 6.3kOe was obtained at 923 K, which i...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2006-10, Vol.42 (10), p.2891-2893
Main Authors: Ohashi, H., Okazaki, Y., Ohya, Y., Yanase, S., Hashi, S.
Format: Article
Language:English
Subjects:
Annealing
Co-ferrite
Coatings
Cobalt
Coercive force
Coercivity
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Magnetic anisotropy
Magnetic films
Magnetic properties
Magnetism
Materials science
Microstructure
Nanostructure
Other topics in materials science
Physics
Sol gel process
sol-gel method
Spin coating
Temperature dependence
Thickness control
thin film
Thin films
Transistors
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Summary:Magnetic properties related to nano-structure have been investigated for sol-gel grown spinel Co-ferrite thin films of which thickness was 200-300 nm controlled by spin coating. The magnetic properties depended on the annealing temperature, and the coercivity of 6.3kOe was obtained at 923 K, which is about three times higher than that ever reported in Co-ferrite thin films by sol-gel method. The microstructure transformed into columnar from granular at the annealing temperature of 923 K, where magnetic anisotropy and high squareness ratio was observed
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2006.879894