| 摘要 |
1,140,411. Magnetic structures. INTERNATIONAL BUSINESS MACHINES CORP. 6 Dec., 1966 [17 Jan., 1966], No. 54442/66. Heading H1H. [Also in Division C7] Magnetic recording medium having a coercivity greater than 100 oersteds is formed by depositing a ferromagnetic alloy on a substrate at a temperature not greater than 260‹ F. from an atmosphere containing a compound of a ferromagnetic metal and at least one other compound containing no ferromagnetic element. The first compound may be iron pentacarbonyl, dicobalt octacarbonyl, and nickel tetracarbonyl or metal nitrosyl carbonyls, carbonyl hydrides or carbonyl halides. The second compound may be hydrogen sulphide, phosphine, selenides or tellurides. A carrier gas may be used, e.g. He, Ar, CO, CO 2 , N 2 , or H 2 . The substrate may be a metal, organic polymeric material, e.g. polyethylene terephthalate, paper, glass, or ceramic. The energy to decompose the compound may be: heating by conduction, radiation of microwave, or radio frequency, or by using a glow discharge. The product may be Fe, Ni, Co, Fe-Ni, or Co-Ni, containing P or S, and is said to be isotropic. |
