| 摘要 |
A magneto-optical storage medium for the repeated writing of information at a write temperature Tw, or at two write temperatures Th, Ti, above the room temperature Ta and for the repeated reading out at a temperature Tm, with a front mask at the temperature Tf and a rear mask at a temperature Tr, above the room temperature Ta, in an external magnetic field He, which medium includes a substrate, a first magnetic layer which is disposed on the substrate and has a temperature-dependent coercivity HC1(T), a compensation temperature Tcp1 and a Curie temperature TC1, a second magnetic layer which is disposed on the first magnetic layer and has a temperature-dependent coercivity HC2(T), a compensation temperature Tcp2 and a Curie temperature TC2, and a third magnetic layer which is disposed on the second magnetic layer and has a temperature-dependent coercivity HC3(T), a compensation temperature Tcp3 and a Curie temperature TC3, where: Ta<Tf<Tm</=Tcp1</=Tcp2<TC2<Tr<TC1<Tcp3<TC3</=Tw and HC1(T)<He for Ta<T<Tm HC2(T)<He for Ta<T<Tm HC3(T)>He for T<Tw, is characterized by a high signal to noise ratio which is achieved as a result of an improved magneto-optical effect.
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