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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Yi-Hung Lin Jen-Hwa Hsu Fu-Te Yuan Kuo, P.C. Mei, J.K. |
| Copyright Year | 1965 |
| Abstract | L10-FePt(001) films with compositional gradient was proposed to realize the graded film with magnetic perpendicular anisotropy in this study. A hard magnetic layer of 5 nm-thick stoichiometry L10 FePt was initially deposited onto a glass substrate with a thin MgO underlayer. The hard layer exhibits strong (001) texture, island-type surface morphology, high perpendicular magnetic anisotropy (PMA), and large out-of-plane coercivity (Hc⊥) of about 20 kOe at room temperature (RT). A 5-nm-thick compositionally graded Fe-Pt layer was then deposited on the L10 FePt hard layer at deposition temperatures (Td) from 300 to 450°C. Good (001)-texture is retained in the graded layer and the island-type morphology is preserved when Td ≤ 400°C. A significant reduction in Hc⊥ from 20 to around 7 kOe was achieved. Besides, the graded films exhibit magnetically single-phase reversal behavior with a high anisotropy field (H0) of ~90 kOe. When Td > 400°C, PMA of the films was reduced due to the extensive diffusion between the Fe-rich graded and hard layers. Our proposed scheme demonstrate the feasibility of magnetic gradation induced by binary composition variation in FePt films, providing useful information for designing future ultrahigh magnetic recording media. |
| Sponsorship | IEEE Magnetics Society |
| Starting Page | 3679 |
| Ending Page | 3682 |
| Page Count | 4 |
| File Size | 726461 |
| File Format | |
| ISSN | 00189464 |
| Volume Number | 49 |
| Issue Number | 7 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2013-07-01 |
| Publisher Place | U.S.A. |
| Access Restriction | One Nation One Subscription (ONOS) |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Iron Magnetic domains Perpendicular magnetic recording Perpendicular magnetic anisotropy Media perpendicular magnetic anisotropy FePt alloy $L1_{0}$ graded film magnetization reversal |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering |
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