| 简介 |
A magneto-optical recording medium having a land/groove track formed on a transparent substrate, wherein the land and the groove of the land/groove track each has a substantially flat region, and recording is made on both the land and the groove, wherein at least an interference layer made of a dielectric and a magnetic layer made of a magnetic amorphous alloy of rare-earth metal and transition metal and having a thickness of at least 50 nm are formed, in this order, on the substrate, and relationships represented by the following formulas are satisfied : wherein Nsub is the refractive index of the substrate, N is the refractive index of the interference layer, d is the thickness (nm) of the interference layer, and lambda is the wavelength (nm) in air of a readout beam. |
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