| 摘要 |
<p>This improved magnetic medium comprises a non-magnetic substrate on which a magnetic layer (1) is formed. (1) is composed of: (a) (1-8 wt.%) one or more metals selected from B, Al, Si, P, Ge, Sn, Sb, Se, Te, Pb, Bi, Cu, Ti, V, Cr, Zr, Nb, Mo, W and Ta; (b) (up to 13 wt.%) one or more rare earth elements selected from Y, La, Ce, Pr, Nd, Sm, Gd, Tb and Dy; (c) (3-13 wt.%) oxygen; and (d) (the remaining wt.%) Co and unavoidable impurities. (1) may also contain Ni (up to 22 wt.%). The unavoidable impurities are one or more of S, C, Fe and Zn. The total impurity content must be less than 1 wt.%. The thickness of the magnetic layer is 0.1-1.0 micron. The non-magnetic substrate is polyester, acetate, polycarbonate, polyimide, glass plate or Al plate. The magentic layer is formed on the non-magnetic substrate by means of spattering, ion-plating or vacuum evaporation. The surface of the non-magnetic substrate is subjected to corona discharge or treated with primer before deposition of the magnetic layer.</p> |
