MULTI-VALUED MO RECORDING BY A LASER PUMPED FIELD MODULATION METHOD

For high density MO recording, a new recording method, magnetic multi-valued MO (MMV) has been introduced[1]. A quadri-valued recording was realized using a magnetic field modulation method. For practical use of this technique, the external field for recording four levels has been reduced down to 150 Oe arranging magnetic capping layer composition of the MMV media. And using the laser pumped field modulation recording method, 0.8μm mark recording has been achieved on the quadri-valued media, which effectively corresponds to 0.4μm binary mark recording.