| 摘要 |
PURPOSE:To obtain the titled medium for horizontal recording having excellent magnetic characteristic and corrosion resistance by composing the magnetic film of a Co-Cr alloy which is an h.c.p. crystal consisting essentially of crystal grains having specified grain diameter and whose C axis is substantially in the plane. CONSTITUTION:A substrate layer and a magnetic layer are formed on a discoid substrate and a protective film (sputtered amorphous, graphitic or diamond carbon films, a coated liq. lubricant, etc.) is, if necessary, formed on the surface of the magnetic layer. The magnetic film is composed of a Co-Cr alloy contg. 3-20atom% Cr, which is an h.c.p. crystal consisting essentially of crystal grains having 100-500Angstrom grain diameter and whose C axis is substantially in the plane. Although ceramic and glass can be used as the substrate, an aluminum substrate and an aluminum alloy substrate are more preferably used.
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