Stock material or miscellaneous articles – All metal or with adjacent metals – Having magnetic properties – or preformed fiber orientation...
Patent
1989-08-08
1992-09-01
Sheehan, John P.
Stock material or miscellaneous articles
All metal or with adjacent metals
Having magnetic properties, or preformed fiber orientation...
428668, 428928, H01F 100
Patent
active
051437945
ABSTRACT:
A magnetic recording medium for longitudinal recording with a low media noise, a high S/N ratio and high reliabilities in corrosion resistance is disclosed. By making a magnetic layer from a Co-based alloy comprising 1 to 35 at. % of at least one element selected from the group consisting of Pt and Ir, 1 to 17 at. % of at least one element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W. Ge and Si, except for Si, whose concentration is 1 to 40 at. %, and 0.1 to 10 at. % of oxygen, a magnetic recording medium for longitudinal recording having an inplane coercivity of 1,200 Oe or more and a coercive squares of not more than 0.85 is obtained.
A process for producing the magnetic recording medium for longitudinal medium and a magnetic memory apparatus using the magnetic recording medium for longitudinal recording are also disclosed.
REFERENCES:
patent: 4622271 (1986-11-01), Arai et al.
patent: 4652499 (1987-03-01), Howard
patent: 4654276 (1987-03-01), Ahlert et al.
patent: 4929514 (1990-05-01), Natarajan et al.
patent: 4950548 (1990-08-01), Furusawa et al.
Hishiyama Sadao
Matsuda Yoshibumi
Ohno Tomoyuki
Ohura Masaki
Shige Noriyuki
Hitachi , Ltd.
Sheehan John P.
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