MAGNETO-OPTICAL RECORDING MEDIUM WITH ANTI-FERROMAGNETICALLY COUPLED DOMAIN-EXPANSION DOUBLE-LAYER STRUCTURE

摘要

A kind of Magnetooptic recording medium and its manufacturing method are made of double-deck or double-layer structure wherein reading extension layer (EL), have inverse ferric magnetosphere, such as GdFeCo or TbFeCo, be coupled on relatively thin non-magnetic metal layer (such as Ru layers). Under the influence of the temperature for reading radiation beam hot spot increases and comes from the stray magnetic field of accumulation layer (SL), the intensity of magnetization in bilayer will be switched to parastate from antiparallel state. One major advantage of this layer of structure is that it for the magnetization up and down in accumulation layer (SL) provides symmetrical read response, and in principle can it is no it is external read field in the case where use.