Metal treatment – Stock – Magnetic
Patent
1996-10-24
1999-06-01
Nguyen, Nam
Metal treatment
Stock
Magnetic
428694T, 428694TS, 428457, 428900, 428611, 428668, 428928, 420435, 420436, 420439, H01F 104
Patent
active
059085142
ABSTRACT:
A new magnetic alloy exhibits high Hc and Ms while exhibiting excellent corrosion resistance, thereby providing ideal physical properties for high density recording applications. Other parameters of the media, such as SNR, PW50, and S are at least maintained, if not also improved. The alloy contains cobalt and up to 10 at. % Ni, up to 20 at. % Pt, up to 10 at. % Ta, up to 10 at. % Ti, and optionally up to 6 at. % B. The ratio of the tantalum to titanium in the alloy is between 3:1 and 1:3. The alloy is deposited by vacuum deposition (typically sputtering) on a similarly deposited non-magnetic alloy under layer. Nitrogen and/or oxygen may be introduced into the alloy during deposition to improve SNR. Other corrosion-resistant thin film alloys may also be obtained by the inclusion of Ta and Ti.
REFERENCES:
patent: 4411963 (1983-10-01), Aine
patent: 4503125 (1985-03-01), Nelson et al.
patent: 4749459 (1988-06-01), Yamashita et al.
patent: 4786553 (1988-11-01), Shiroishi et al.
patent: 4786564 (1988-11-01), Chen et al.
patent: 4789598 (1988-12-01), Howard et al.
patent: 4792497 (1988-12-01), Suzuki et al.
patent: 4837094 (1989-06-01), Kudo
patent: 4898774 (1990-02-01), Yamashita et al.
patent: 4949202 (1990-08-01), Kim
patent: 4950548 (1990-08-01), Furusawa et al.
patent: 4988578 (1991-01-01), Yamashita et al.
patent: 5004652 (1991-04-01), Lal et al.
patent: 5024903 (1991-06-01), Mizukami
patent: 5025335 (1991-06-01), Stefansky
patent: 5025336 (1991-06-01), Morehouse
patent: 5027241 (1991-06-01), Hatch
patent: 5045165 (1991-09-01), Yamashita
patent: 5049451 (1991-09-01), Lal et al.
patent: 5112669 (1992-05-01), Yoden et al.
patent: 5162158 (1992-11-01), Christner et al.
patent: 5180640 (1993-01-01), Yamashita et al.
patent: 5232570 (1993-08-01), Haines et al.
patent: 5282946 (1994-02-01), Kinoshita et al.
patent: 5631094 (1997-05-01), Ranjan et al.
patent: 5658659 (1997-08-01), Chen et al.
patent: 5665478 (1997-09-01), Suzuki et al.
Williams and Comstock, "An Analytical Model of the Write Process in Digital Magnetic Recording", 17th Annual AIP Conf. Proc., Part I, No. 5, 1971, pp. 738-742.
Zhu et. al., "Micromagnetic Studies of Thin Metallic Films", Journal of Applied Physics, vol. 63, No. 8, 1988, p. 3248.
Chen et. al., "Physical Origin of Limits in the Performance of Thin-Film Longitudinal Recording Media", IEEE Trans. Mag., vol. 24, No. 6, 1988, p. 2700.
Maeda, H., "Effects of Nitrogen on the High Coercivity and Microstructures of Co--Ni Alloy Films", Journal of Applied Physics, vol. 53, No. 10, 1982, pp. 6941-6945.
Murdock et. al., "Roadmap to 10 Gb/in.sup.2 Media: Challenges", IEEE Trans. Mag., 1992, p. 3078.
Opfer et. al., "Thin Film Memory Disk Development", Hewlett Packard Journal, Nov., 1985, pp. 4-10.
Aboaf et. al., "Magnetic Properties and Structure of Co--Pt Thin Film", IEEE Trans. Mag., MAG-19, No. 4, 1983, p. 1514.
Johnson et. al., "Composition Effects on Recording Properties of CoPtCr Thin Film Media", IEEE Trans. Mag., MAG-29, No. 6, 1993, p. 3670.
King, "Datapoint Thin Film Media", IEEE Trans. Mag., MAG-17, No. 6, Jul. 1981, pp. 1376-1379.
Chen John Ko-Jen
Chen Tu
Ranjan Rajiv Yadav
Yamashita Tsutomu Tom
Nguyen Nam
Small Jonathan A.
VerSteeg Steven H.
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