Magnetic recording medium having perpendicular magnetic anisotro

Details Magnetic recording medium having perpendicular magnetic anisotro Magnetic recording medium having perpendicular magnetic anisotro

1987-06-04

1989-06-20

Thibodeau, Paul J.

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Web or sheet containing structurally defined element or...

Physical dimension specified

427132, 428694, 428900, G11B 564

Patent

active

048408450

ABSTRACT:
A magnetic recording medium having good perpendicular magnetic anisotropy is provided in which an alloy mainly consisting of Fe and Ti; or Fe, Ti and Cr; is fabricated on a substrate to have a structure of mixed phase comprising an amorphous phase and an isolated crystalline grains with bcc phase surrounded by the amorphous phase to have the perpendicular magnetic anisotropy, the atomic percents of Ti component in the Fe-Ti alloy being 15-21 and the atomic percents of Ti and Cr components in the Fe-Ti-Cr alloy being 5-21 and 5-15, respectively.
Thus, a good perpendicular magnetic recording medium suitable for massproduction can be provided at a lower cost by using relatively cheap Fe and Ti as main components.

REFERENCES:
patent: 3853700 (1974-12-01), Armijo
patent: 4020236 (1977-04-01), Aonuma et al.
patent: 4063000 (1977-12-01), Aonuma et al.
patent: 4325733 (1982-04-01), Aboaf
patent: 4349527 (1982-09-01), Amano et al.
patent: 4693927 (1987-09-01), Nishikawa et al.
Tsutsumi et al., "Fe-Nd-Ti Films with Perpendicular Magnetic Anisotropy", Japanese Journal of Applied Physics, vol. 23, No. 3, Mar. 1984, pp. L169-L171.

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