MAGNETO-OPTICAL RECORDING DISK REPRODUCING METHOD, MAGNETO-OPTICAL DISK DRIVE DEVICE AND MAGNETO-OPTICAL RECORDING DISK

摘要

PROBLEM TO BE SOLVED: To prevent an error of erasing recorded information when a regular magneto- optical recording medium is reproduced and to improve convenience by automatically switching a reproducing mode of to magnetic domain expansion reproduction system to the reproducing mode for a regular magneto-optical recording medium based on discriminative information carried on a disk. ;SOLUTION: In the magneto-optical recording medium of the magnetic domain expansion reproduction system provided with plural magnetic layers and recording on the magnetic layer most parting from a laser beam irradiation surface, a recording magnetic domain of a recording mark is expansion transferred on the magnetic layer the nearest to the laser beam irradiation surface by laser beam irradiation of 0.5-5.0 mW and reproducing magnetic field application of 50-300 Oe, and is read by the laser beam, and then, an opposite directional erase magnetic field of 50-300 Oe is applied, and the transferred magnetic domain is erased. At this time, the regular magneto- optical recording medium is discriminated by the means such as that a detection hole is provided on a cartridge housing the disk main body, and the discriminative information is carried on the pre-pit of the disk, etc., and the application of an alternate magnetic field is prevented.;COPYRIGHT: (C)1999,JPO