Fabrication of FePt and CoPt Magnetic Nanodot Arrays by Electrodeposition Process

Fabrication of Co-Pt and Fe-Pt ferromagnetic nanodot arrays for the application of ultra-high density bit patterned media (BPM) by electrochemical processes was described. In order to form patterned substrates for nanodot arrays with the density higher than 1 Tbit/inch2, electron beam lithography te...

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Bibliographic Details
Published in:ECS transactions 2015-03, Vol.64 (31), p.1-9
Main Authors: Homma, Takayuki, Wodarz, Siggi, Nishiie, Daiki, Otani, Tomohiro, Ge, Siyuan, Zangari, Giovanni
Format: Article
Language:English
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Summary:Fabrication of Co-Pt and Fe-Pt ferromagnetic nanodot arrays for the application of ultra-high density bit patterned media (BPM) by electrochemical processes was described. In order to form patterned substrates for nanodot arrays with the density higher than 1 Tbit/inch2, electron beam lithography technique was employed. Nanopatterns with 25 nm and 18 nm pitch, which correspond to 1 and 2 Tbit/inch2 were successfully formed by optimizing the condition of the lithography process, and Co-Pt and Fe-Pt with relatively high coercivity of 4.8 kOe and 10.3 kOe were formed by electrodeposition. By utilizing the nanopatterned substrates, Co-Pt and Fe-Pt nanodot arrays with 25 nm and 35 nm pitch were uniformly formed. These results demonstrate capability of the electrochemical processes for fabricating magnetic nanodot arrays with Tbit-level density.
ISSN:1938-5862
1938-6737
DOI:10.1149/06431.0001ecst