Ferrimagnetic zinc ferrite fine powders

Partially inverted fine powders of zinc ferrite (ZnFe/sub 2/O/sub 4/) were produced by chemical aerogel synthesis. These powders showed magnetic ordering at temperatures to 250 K. Upon ball milling, a much higher inversion parameter was attained, yielding ferrimagnetic powders having small remanence...

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Bibliographic Details
Published in:IEEE transactions on magnetics 1995-11, Vol.31 (6), p.3808-3810
Main Authors: Hamdeh, H.H., Ho, J.C., Oliver, S.A., Willey, R.J., Kramer, J., Chen, Y.Y., Lin, S.H., Yao, Y.D., Daturi, M., Busca, G.
Format: Article
Language:English
Subjects:
Ball milling
Chemicals
Coercive force
Ferrimagnetic materials
Ferrites
Magnetic properties
Magnetization
Paramagnetism
Particle size analysis
Powders
Remanence
Synthesis (chemical)
Temperature
Thermal effects
X-ray diffraction
Zinc
Zinc compounds
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Summary:Partially inverted fine powders of zinc ferrite (ZnFe/sub 2/O/sub 4/) were produced by chemical aerogel synthesis. These powders showed magnetic ordering at temperatures to 250 K. Upon ball milling, a much higher inversion parameter was attained, yielding ferrimagnetic powders having small remanence and coercive fields at room temperature. Due to the small mean particle size, superparamagnetic behavior was seen at temperatures above 25 K. Powder properties were characterized by X-ray diffraction, electron microscopy, calorimetry, magnetometry, and Mossbauer effect spectroscopy techniques.
ISSN:0018-9464
1941-0069
DOI:10.1109/20.489779