Effects of film thickness and droplets on magnetic properties of SmFeN films prepared by laser ablation technique

SmFeN film magnets were prepared by the laser ablation technique, and effects of film thickness and droplets on their magnetic properties were studied. An increase in the film thickness increased coercivity. The thermomagnetic analysis and the X-ray photoelectron spectroscopy indicated that the obse...

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Bibliographic Details
Published in:IEEE transactions on magnetics 1999-09, Vol.35 (5), p.3052-3054
Main Authors: Jae Man Song, Sadakata, H., Nakano, M., Kanai, Y., Fukunaga, H., Jae Gui Koh
Format: Article
Language:English
Subjects:
Coercive force
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Iron
Laser ablation
Magnetic analysis
Magnetic films
Magnetic properties
Magnetic properties and materials
Magnetic properties of monolayers and thin films
Magnetic properties of surface, thin films and multilayers
Magnets
Oxidation
Physics
Spectroscopy
X-ray lasers
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Summary:SmFeN film magnets were prepared by the laser ablation technique, and effects of film thickness and droplets on their magnetic properties were studied. An increase in the film thickness increased coercivity. The thermomagnetic analysis and the X-ray photoelectron spectroscopy indicated that the observed increase in the coercivity can be attributed to the suppression of oxidation of Sm. Droplets on film surfaces included a larger amount of Fe than flat parts without droplets and a decrease in the number of droplets results in an increase in coercivity. The coercivity of 6.5 kOe was obtained for the 5 /spl mu/m thick film with a small number of droplets.
ISSN:0018-9464
1941-0069
DOI:10.1109/20.801082