| 摘要 |
PURPOSE:To increase the light reflectance of a magneto-optical recording film and to improve the reproduction output or the recording-reproducing characteristics by incorporating Pt, Rh, Pd or Au into the recording film. CONSTITUTION:A film 2 having an optical effect is formed by sputtering on a substrate 1 of glass or high heat resistance resin having cleaned guide grooves and a magneto-optical recording film 3 is further formed. The film 3 is made of a magneto-optical recording material mixed with 0.5-15 atomic% at least one kind of noble metal selected among Pt, Au, Rh and Pd. The noble metal in the film 3 is preferably distributed so as to make the concn. high in the vicinity of the surface of the film 3 on which the writing and readout of informa tion are carried out and to gradually lower the concn. in the perpendicular direction. The resulting recording material can maintain high reflectance due to the noble metal as a whole over a long period.
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