Preparation of Cobalt-Modified γ-Fe2O3 Thin Films and Their Surface Structures
- 1 May 1988
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 27 (5R)
- https://doi.org/10.1143/jjap.27.771
Abstract
Cobalt modification was made in a wet process for the γ-Fe2O3 thin films which were derived from iron thin films prepared by a vacuum evaporation method. The surface structures were closely investigated by X-ray diffraction, electron microscopic observations of surface replica films, reflection electron diffraction, and ESCA, and were discussed with the magnetic properties. In the modification reaction at 55degC by a simultaneous addition of iron and cobalt ions, δ-(Fe0.67Co0.33)OOH particles which were attached to the spinel-modified layer were detected. The diffusion of the particles into the film and the resulting formation of a spinel phase were found to play important roles in the improvement of the magnetic properties.Keywords
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