NDLI: Potential of Metallic Glass Thin Films as a Soft Magnetic Underlayer for <inline-formula> <tex-math notation=TeX>${rm L}1_{0}$ </tex-math></inline-formula> FePt-Based Recording Media

Content Provider	IEEE Xplore Digital Library
Author	Kaushik, N. Sharma, P. Makino, A. Tanaka, S. Esashi, M.
Copyright Year	1965
Abstract	We report on the use of metallic glass (FeHfNbYB) thin film as a soft magnetic underlayer for the fabrication of L1₀ FePt-based bit patterned recording media (BPM). Preferred oriented phase of L1₀ (111) FePt is obtained either by depositing it in situ on a heated soft magnetic metallic glass/SiO₂/Si or at room temperature (FePt/metallic glass/SiO₂/Si) followed by annealing at 400 °C-450 °C for 20 min. Fabrication of recoding bits of size ~2 μm to 20 nm is demonstrated using electron beam lithography. Magnetic measurements on ~500 nm bit patterns show a narrow switching field (SF) distribution with SF of ~3 kOe. The ability to read/write this BPM is demonstrated with a commercial head in perpendicular geometry in a static tester. Results strongly suggest that the soft magnetic metallic glass thin films can solve the problem of writability in high anisotropy L1₀ FePt-based recording media.
Sponsorship	IEEE Magnetics Society
Starting Page	1
Ending Page	4
Page Count	4
File Size	981749
File Format	PDF
ISSN	00189464
Volume Number	50
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Perpendicular magnetic anisotropy Perpendicular magnetic recording Soft magnetic materials Amorphous magnetic materials Magnetic domains soft magnetic underlayer (SMUL) Bit patterned media (BPM) inclined anisotropy media ${\rm L}1_{0}$ FePt metallic glass thin film
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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