Simulation study of bit patterned media with inclined anisotropy for recording density of 5 Tbit/in[2] (特集 ナノマグネティクス技術とその応用)
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概要
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Recording simulation at 5 Tbit/in2 was studied for bit patterned media with inclined anisotropy. Magnetic dot was modeled as 7.5×10×5 nm3 with saturation magnetization of 1000 emu/cm3 and average anisotropy field of 22 kOe, and the dots were arranged with 10 and 12.5 nm in down- and cross-track periods, respectively, on a soft magnetic underlayer. The magnetic anisotropy of the dots was set at 30 degrees from longitudinal direction. Maximum filed of around 15 kOe was obtained for a shielded planar head with a pole size of 10×45 nm2 in spite of relatively large head-medium spacing of 6 nm. Recording with the head revealed large write shift margins of around 5 nm in down- and cross-track directions. On track recording simulation indicated tolerances of around 4 % in anisotropy field dispersion and 4 degrees in orientation dispersion.
- 2010-07-01
著者
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Honda Naoki
Faculty of Engineering, Tohoku Institute of Technology
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Yamakawa Kiyoshi
AIT, Akita Prefectural R & D Center
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Ouchi Kazuhiro
AIT, Akita Prefectural R & D Center
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Honda Naoki
Faculty Of Engineering Tohoku Institute Of Technology
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Yamakawa Kiyoshi
Ait Akita Prefectural R & D Center
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Ouchi Kazuhiro
Ait Akita Prefectural R & D Center
関連論文
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