MAGNETOOPTICAL RECORDING MEDIUM

摘要

A magnetooptical recording medium suitable for magnetic field modulation recording in a weak electric field. The recording medium includes a laminate of a recording layer (13) and an auxiliary recording layer (14) having a film thickness of not greater than 100 ANGSTROM . The recording layer (13) comprises a vertical magnetization film of at least 150 emu/cc at room temperature, and a magnetization artificial lattice film using a heavy rare earth-transition metal alloy or a precious metal, an oxide such as garnet or spinel ferrite or other magnetic alloys are used, for example. The auxiliary recording layer (14) typically comprises a heavy rare earth-transition metal alloy, and has a lower Curie point (preferably by at least 30 K lower) than that of the recording layer (13). A stabilization layer having a lower Curie point than the recording layer (13) but having greater coercive force at room temperature may be further laminated on the recording layer (13). When HREx(Fel-yCoy)1-x (where HRE: heavy rare earth metal) is used for the recording layer, the relations 0.08