| 摘要 |
A magneto-optical recording medium has magneto-optical recording layers ( 11, 12, 13 ) and reproducing layers ( 21, 22, 23 ). The information recorded in the reproducing layers are reproduced by means of reproducing light beams ( 31, 32, 33 ) of different wavelengths, respectively. In reproduction, magnetic domains ( 4 ) recorded in the recording layers are transferred in the reproducing layers formed on the respective recording layers, the transferred magnetic domains ( 5 ) are enlarged with an external magnetic field, and the information is reproduced. Since information is recorded and reproduced for each recording layer, the recording density is improved. Further since the reproduction signals are amplified by the magnetic domain enlargement, the C/N is improved. |
