film for magnetic senkrechtaufzeichnung, multi-layered film suitable for conversion to the film for magnetic senkrechtaufzeichnung, and process for the production of film for magnetic senkrechtaufzeichnung this mehrsichtigen film.

摘要

A perpendicular magnetic film comprising a Co-containing gamma -Fe2O3 film formed on a substrate, in which the plane (400) is predominantly oriented in parallel with said substrate, the molar ratio of Co to Fe is from 0.01:1 to 0.32:1, the spacing of said plane (400) is not more than 2.084 A, and the optical absorption coefficient at 700 nm is not more than 2.5 mu m-1.