Grain isolated L1{sub 0} FePt-Ta{sub 2}O{sub 5} nanocomposite films with large coercivity for perpendicular recording applications
Journal Article
·
· Journal of Applied Physics
- Data Storage Institute, A-STAR - Agency for Science, Technology and Research, 5 Engineering Drive 1 (off Kent Ridge Crescent, NUS), Singapore 117608 (Singapore)
- Department of Materials Science and Engineering, National University of Singapore, 7 Engineering Drive 1, Singapore 117574 (Singapore)
L1{sub 0} FePt-Ta{sub 2}O{sub 5} films with (001) texture were synthesized by cosputtering FePt and Ta{sub 2}O{sub 5} targets and in situ heated at 350 deg. C. The (001) preferred orientation was preserved even when doped with 20 vol % Ta{sub 2}O{sub 5}. The out-of-plane coercivity, H{sub c}, increased from 6.7 kOe (for pure FePt film) to 8.8 kOe when doped with 20 vol % Ta{sub 2}O{sub 5}. Further increase in the dopant content to 25 and 30 vol % caused H{sub c} to decrease significantly to below 3 kOe. Well-isolated FePt grains of tall column structures were observed for the 12 nm thick FePt film when doped with 20 vol %. The loop slope parameter, {alpha}, of such FePt film approached 1.
- OSTI ID:
- 21190137
- Journal Information:
- Journal of Applied Physics, Vol. 105, Issue 7; Conference: 53. annual conference on magnetism and magnetic materials, Austin, TX (United States), 10-14 Nov 2008; Other Information: DOI: 10.1063/1.3074133; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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