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A new type of magneto-optical memory system using a chromium dioxide (Cr02) disk combined with a magnetic garnet film was described. Thermomagnetic recording was done onto the 35 cm diameter Cr02 disk with the focused Ar-laser beam and a recorded signal was read out magneto-optically through a magnetic garnet film placed close to the disk surface. A carrier-to-noise ratio of 35 dB was obtained at a disk speed of 50 m/s and frequency of 7 MHz. Track width of 3-4 μm was observed. A real time video recording experiment was successfully demonstrated.
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