Adding Si02 to Increase Coercivity and Squareness Ratio of Ba Ferrite Films for Perpendicular Magnetic Recording Media (第4回アジア情報記録技術シンポジウム)
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概要
- 論文の詳細を見る
In this study, SiO_2 added Ba ferrite(BaM:SiO_2)films were prepared. BaM:SiO_2 films exhibited H_<c*&boiiom;>as high as 4.2kOe and squareness ratio of 0.83, although M_S decreased to 80% of that of simple Ba ferrite films. Angular dependence of coercivity H_C and remanent coercivity H_r were investigated to explain the magnetization reversal mechanism. Intergranular interctions in the films were also evaluated. The magnetization reversal mode of Ba ferrite films with and without SiO_2 additives is not coherent rotation but seems like curling mode. SiO_2 additives did not decrease perpendicular anisotropy of grains apparently, but seemed to prevent the expansion of reversed domain in the magnetization reversal process of curling just like some effects of pinning.
- 社団法人映像情報メディア学会の論文
- 1999-11-09
著者
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FENG J.
Department of Biomedical Sciences, Baylor College of Dentistry, Texas A&M Health Science Center
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NAKAGAWA S.
Department of Internal Medicine, School of Medicine, Keio University
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Matsushita N.
Department of Medicine Kyoto University Faculty of Medicine
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Naoe M.
Department Of Physical Electronics Tokyo Institute Of Technology
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Funabashi N.
Department of Physical Electronics, Tokyo Institute of Technology
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Funabashi N.
Dept.of Physical Electronics Tokyo Institute Of Technology
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Feng J.
Department Of Physical Electronics Tokyo Institute Of Technology
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Feng J.
Department Of Biomedical Sciences Baylor College Of Dentistry
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Nakagawa S.
Department Of Physical Electronics Tokyo Institute Of Technology
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Matsushita N.
Department Of Physical Electronics Tokyo Institute Of Technology
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