DocumentCode
1384698
Title
Degradation mechanism of magnetic properties of Co-O film caused by residual gas
Author
Iimura, M. ; Kubota, T. ; Hirano, H. ; Ogawa, Y. ; Mizumura, T.
Author_Institution
Magnetic Media Dev. Center, Hitachi Maxell Ltd., Ibaraki, Japan
Volume
32
Issue
5
fYear
1996
fDate
9/1/1996 12:00:00 AM
Firstpage
3626
Lastpage
3628
Abstract
The effects of the residual gas pressure on the magnetic properties of Co-O films were studied. The coercivity (Hc) and squareness ratio (Mr/Ms) decreased with increasing the residual gas pressure. Among the species, water vapor played a decisive role in degrading the magnetic properties. Analysis revealed that the degradation was caused by decrease in the anisotropy field (Hk) and increase in the easy axis angle (α) of the film. These changes in He and α by water vapor can be explained qualitatively
Keywords
cobalt compounds; coercive force; environmental degradation; magnetic anisotropy; magnetic thin films; Co-O; Co-O film; anisotropy field; coercivity; degradation; easy axis angle; magnetic properties; residual gas; squareness ratio; water vapor; Degradation; Diffraction; Helium; Magnetic anisotropy; Magnetic films; Magnetic properties; Oxidation; Perpendicular magnetic anisotropy; Pressure measurement; Water;
fLanguage
English
Journal_Title
Magnetics, IEEE Transactions on
Publisher
ieee
ISSN
0018-9464
Type
jour
DOI
10.1109/20.538711
Filename
538711
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