Abstract
The write/erase cyclic characteristics of Co/Pt disks have been studied. A Co/Pt disk with a quadri-layer structure and a Curie temperature of 355°C attained 10 6 write/erase cycles with a constant carrier-to-noise ratio. For a double-layer structure, the carrier-to-noise ratio decreased at 10 6 cycles because of interfacial mixing due to heating cycles with higher peak temperatures.
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