Kazutomo Miyata

LIMDOW-MSR MO disk memory

Summary form only given. Light intensity modulation direct overwrite (LIMDOW) magneto optical disc memory with magnetically induced superresolution (MSR) is studied. LIMDOW-MSR added only one layer in a conventional LIMDOW and deposited by a production-machine is enough to support a linear density of 0.34 /spl mu/m/bit.

High-speed response to laser heating and cooling in thermo-magnetic writing on magneto-optical disk memory

In order to use Magneto-Optical (MO) media for multi media applications, it is necessary to achieve higher density, higher data transfer rate and lower cost technologies than current MO media. MO recording is thermo- magnetic recording. MO recordings makes use of temperature modulation caused by light intensity modulation from the laser diode for recording. So, it is important to realize high speed response to the light intensity modulation for high data transfer rate recording. The high speed response is also indispensable to make small magnetic domains. So, it is important for high density recording, too. We investigate the temperature response to the light intensity modulation on MO disk. consequently, we found that MO medium shows the high speed response when the laser spot scanning velocity is large.