Magnetic disc.

摘要

A magnetic disc having a first layer substantially comprising Cr and a second layer which is a filmy magnetic recording medium of Co-Ni or Co-system, formed on a non-magnetic substrate, wherein oxygen is incorporated in the first layer. The static magnetic property and electro-magnetic convention property, as well as other properties, e.g., coercive force and corrosion resistance can be improved remarkably. In additon,t he disc show excellent crystal orientation with no variations on every film-formation.