Potential of Metallic Glass Thin Films as a Soft Magnetic Underlayer for L1_0 FePt-Based Recording Media

Neelam Kaushik; Parmanand Sharma; Akihiro MakinoShuji TanakaMasayoshi Esashi

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Potential of Metallic Glass Thin Films as a Soft Magnetic Underlayer for L1_0 FePt-Based Recording Media

机译：Potential of Metallic Glass Thin Films as a Soft Magnetic Underlayer for L1_0 FePt-Based Recording Media

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We report on the use of metallic glass (FeHfNbYB) thin film as a soft magnetic underlayer for the fabrication of L1_0 FePt-based bit patterned recording media (BPM). Preferred oriented phase of L1_0 (111) FePt is obtained either by depositing it in situ on a heated soft magnetic metallic glass/SiO_2/Si or at room temperature (FePt/metallic glass/SiO_2/Si) followed by annealing at 400℃-450℃ 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 L1_0 FePt-based recording media.

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《IEEE Transactions on Magnetics》 |2014年第1期|3201404-1-3201404-4|共4页
作者
Neelam Kaushik; Parmanand Sharma; Akihiro MakinoShuji TanakaMasayoshi Esashi;
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作者单位

WPI-Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan;

Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan;

Research and Development Center for Ultra High Efficiency Nano-Crystalline Soft Magnetic Materials, Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan;

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正文语种英语
中图分类计量学;
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Potential of Metallic Glass Thin Films as a Soft Magnetic Underlayer for L1_0 FePt-Based Recording Media

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