Detecting dynamic signals of ideally ordered nanohole patterned disk media fabricated using nanoimprint lithography
2007; American Institute of Physics; Volume: 91; Issue: 2 Linguagem: Inglês
10.1063/1.2757118
ISSN1520-8842
AutoresHirotaka Oshima, Hideyuki Kikuchi, Hiroshi Nakao, Ken‐ichi Itoh, Takuya Kamimura, Takeshi Morikawa, Koji Matsumoto, Takahiro Umada, Hiroaki Tamura, Kazuyuki Nishio, Hideki Masuda,
Tópico(s)Block Copolymer Self-Assembly
ResumoThe authors have fabricated ideally ordered alumina nanohole patterned disk media via anodic oxidation and nanoimprint lithography with a thermoplastic resist. The ordered arrays of alumina nanoholes with 100nm pitch, filled with Co by electrodeposition, were created over a macroscopically large area on a hard-disk substrate using these industrially applicable nanofabrication technologies. Stable flight of a perpendicular magnetic head above the media and perpendicular magnetic anisotropy of the Co nanopillars enable high-speed dynamic magnetic recording and playback. Dynamic periodic signals that matched the nanopillar periodicity were clearly observed after writing bit patterns, showing alternate reversal of magnetization of the nanopillars.
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