Over write capable magnetooptical recording medium

摘要

An overwritable method of magnetooptical recording uses an over write capable magnetooptical recording medium that comprises a substrate and a magnetic layer. The magnetic layer is stacked on the substrate and includes first and second layers each having a perpendicular magnetic anisotropy. When a high-level laser beam irradiates the medium, the magnetization of the second layer is reversed and a bit of one magnetization direction is recorded in the first layer under the influence of the magnetization of the second layer. When a low-level laser beam irradiates the medium, a bit of opposite magnetization direction is recorded in the first layer under the influence of the second layer. This overwritable method of magnetooptical recording exhibits a high C/N ratio without decreasing recording sensitivity.