| 摘要 |
PURPOSE:To obtain a magnetic recording medium having excellent electromagnetic transducing characteristics by a method wherein a magnetic layer containing Co, Ni, Cr and oxygen each in a thermally determined quantity is formed on a nonmagnetic macromolecule film by a rhombic evaporation method. CONSTITUTION:A magnetic layer composed at least of Co, Ni, Cr and oxygen and formed by a trimetric evaporation method is provided on a nonmagnetic macromolecule film 13. In this magnetic layer, the average content of Cr is made to be 2-8 atom%, the average content of oxygen 5-25 atom% and the ratio in the average number of atoms of oxygen to Cr 2-10, and the distribution of the ratio in the number of atoms of oxygen to Cr in the direction of the thickness of the film is made to be larger as nearer to the nonmagnetic macromolecule film side. The minimum trimetric incidence angle theta min formed when the magnetic layer is evaporated by the rhombic evaporation method is preferably 30 to 70 degrees for practical use. |
