Fine particles of α-Fe or Fe(Co) are prepared by the reduction in H2 of γ-FeOOH or Co-ferrite particles which have been wrapped in monomolecular layers of exfoliated MoS2. The presence of the MoS2 restricts coalescence of the starting particles while allowing the reduction to take place. Magnetic moments and coercivities are determined at temperature during processing. Results are given for magnetization measurements, electron microscopy, Mössbauer effect spectroscopy, and x-ray diffraction. Enhanced coercivities are observed when MoS2is present. Surface pinnning is deduced from the approach to magnetic saturation.
|Number of pages||3|
|Journal||IEEE Transactions on Magnetics|
|Publication status||Published - Nov 1993|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering