Potential of Metallic Glass Thin Films as a Soft Magnetic Underlayer for ${\rm L}1_{0}$ FePt-Based Recording Media
| Autor: | Akihiro Makino, Neelam Kaushik, Masayoshi Esashi, Shuji Tanaka, Parmanand Sharma |
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| Rok vydání: | 2014 |
| Předmět: |
Fabrication
Amorphous metal Materials science Magnetic domain Annealing (metallurgy) business.industry Electronic Optical and Magnetic Materials Magnetic anisotropy Nuclear magnetic resonance Optoelectronics Electrical and Electronic Engineering Thin film Anisotropy business Electron-beam lithography |
| Zdroj: | IEEE Transactions on Magnetics. 50:1-4 |
| ISSN: | 1941-0069 0018-9464 |
| DOI: | 10.1109/tmag.2013.2285307 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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