Sputter-deposited (Fe-Pt)-MgO composite films for perpendicular recording media

Aiming for improvement of a pure Fe-Pt perpendicular double-layered medium, a composite film of (Fe-Pt)-MgO with ordered FePt-fct(001) phase was prepared by sputtering on heated substrates without any post-annealing. It was found that the (Fe-Pt)-MgO films exhibited a large perpendicular magnetic an...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2001-07, Vol.37 (4), p.1283-1285
Main Authors: Suzuki, T., Ouchi, K.
Format: Article
Language:English
Subjects:
Aluminum oxide
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Hysteresis loops
Iron
Magnetic anisotropy
Magnetic domains
Magnetic films
Magnetic hysteresis
Magnetic properties and materials
Magnetic recording
Magnetic recording materials
Magnetic storage
Magnetism
Perpendicular magnetic recording
Physics
Recording
Sputtering
Studies of specific magnetic materials
Substrates
Temperature
Thermal stability
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Summary:Aiming for improvement of a pure Fe-Pt perpendicular double-layered medium, a composite film of (Fe-Pt)-MgO with ordered FePt-fct(001) phase was prepared by sputtering on heated substrates without any post-annealing. It was found that the (Fe-Pt)-MgO films exhibited a large perpendicular magnetic anisotropy in the preparation condition of lower substrate temperature than that were required for the films with other additives such as Al 2 O 3 and SiO 2 . The (Fe-Pt)-MgO composite films showed hysteresis loop with relatively steep slope at and smaller magnetic domains than that of the pure Fe-Pt film. A higher recording resolution was achieved for the perpendicular double-layered medium with the (Fe-Pt)-MgO composite film.
ISSN:0018-9464
1941-0069
DOI:10.1109/20.950819