Magnetooptic recording medium containing a multilayer protection film with at least one transition zone between the protection layers

摘要

In a sheet-like, multilayer, magneto-optical recording material which has a base which is transparent to light, a thermally alterable recording layer of an amorphous lanthanide transition metal alloy and, on the base remote side of this recording layer, an anticorrosion layer containing carbides, nitrides and/or oxides, the anticorrosion layerP P(a) is from 30 to 250 nm thick andPP(b) consists of two or more components whichP P(c) are present in four or more separate strata, each consisting of one of the components,P P(d) one or more of the components being selected from the group consisting of the elements boron, aluminum, silicon, titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum and tungsten andPP(e) one or more of the other components being selected from the group consisting of the carbides, nitrides and oxides of these elements (d) andP P(f) directly adjacent strata always consisting of components which differ from one another.