Formation of Ultra-High-Density Ferromagnetic Column Arrays Beyond 1 Tera/inch^2 Using Porous Alumina Template(Nano-Fabrication and Patterned Media)
スポンサーリンク
概要
- 論文の詳細を見る
The formation of ultra-high-density ferromagnetic column arrays beyond 1 Tera/inch^2 was investigated using porous alumina films formed on Si substrate. It was empirically known that a pitch of nanohole array shrunk with a reduction of anodic voltage. We carried out anodic oxidation of sputtered Al film at the anodic voltage below 10V. and found that the density of the nanohole arrays increased significantly with a reduction of the anodic voltage, and reached 1.5 Tera/inch^2 when the anodic voltage was 5.0 V. We also succeeded in the electro-plating of Co column array in these fine holes. The Co column arrays formed by electroplating in the nanoholes were polycrystalline. and showed perpendicular magnetic anisotropy when their aspect ratio was larger than 3. The coercive field of Co columns tended to increase with a reduction of the hole diameter, which was confirmed by micromagnetic simulation based on the LLG equations. These results strongly suggest that ferromagnetic nano column arrays buried in porous alumina film on substrate have a high potential for application to a future ultra-high density magnetic recording media.
- 社団法人日本磁気学会の論文
- 2004-11-01
著者
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新宮原 正三
関西大学大学院工学研究科
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SAKATA Osami
Japan Synchrotron Radiation Research Institute
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新宮原 正三
Hiroshima University Graduate School Of Adsm
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新宮原 正三
広島大学先端物質科学研究科
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Sakata Osami
Experimental Facilities Division Japan Synchrotron Radiation Research Institute
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Sakata Osami
Japan Synchrotron Research Institute
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Sakata O
Japan Synchrotron Radiation Res. Inst. Hyogo Jpn
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Sakata Osami
Japan Synchrotron Radiation Research Institute (jasri)
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Sakata Osami
Japna Synchrotron Radiation Research Institute
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Sakata Osami
Spring-8
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Fujii Youichi
Hiroshima University Graduate School Of Adsm
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SHIMIZU Tomohiro
Graduate School of Advanced Sciences of Matter, Hiroshima University
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SAKAUE Hiroyuki
Graduate School of Advanced Sciences of Matter, Hiroshima University
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Shimizu Tomohiro
Hiroshima University, Graduate School of ADSM
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Nagayanagi Mamoru
Hiroshima University, Graduate School of ADSM
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Yaegashi Osamu
Hiroshima University, Graduate School of ADSM
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Wu Guang
Hiroshima University, Graduate School of ADSM
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Sakaue Hiroyuki
Hiroshima University, Graduate School of ADSM
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Takahagi Takayuki
Hiroshima University, Graduate School of ADSM
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Kusaka Kazuya
Tokushima University, Dept. of Mechanical Engineering
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Shingubara Shoso
Hiroshima University, Graduate School of ADSM
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Wu Guang
Hiroshima University Graduate School Of Adsm
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Sakaue H
Hiroshima University Graduate School Of Adsm
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Kusaka Kazuya
Tokushima University Dept. Of Mechanical Engineering
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Yaegashi Osamu
Hiroshima University Graduate School Of Adsm
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Sakaue Hiroyuki
Hiroshima Univ. Hiroshima Jpn
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Shimizu Tomohiro
Hiroshima University Graduate School Of Adsm
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Takahagi Takayuki
Hiroshima University Graduate School Of Adsm
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Nagayanagi Mamoru
Hiroshima University Graduate School Of Adsm
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Shingubara Shoso
Hiroshima University, Department of Electrical Engineering, 1-4-1 Kagamiyama, Higashi-Hiroshima 739, Japan
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