Co-Ni-Mn系スピネル微粒子を用いたフレキシブルディスクの記録再生特性

概要

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A flexible disk medium composed of Co-Ni-Mn spinel ferrite fine particles was investigated in order to confirm its high-density recording performance. This medium was prepared from particles with mean size of 25 nm using a spin coater without burnishing. The recording characteristics were measured on a spinstand tester at a rotating speed of 2940 rpm, using a floating MIG (metal in gap) head for writing and reading. The linear recording density at 50% of maximum output was 52 kBPI (bit per inch) was obtained, whereas that of commercial Zip media (Fe-Co particles) was 67 kBPI. The overwrite performance is very important for high-density recording, and it was better than 28 dB, which was close to the results for Zip media at 1 MHz. The carrier-to-noise ratio for this disk was 32.2 dB after writing a 10 MHz signal. The results of experiments showed that the Co-Ni-Mn spinel ferrite disk has potential for high-density recording media.
明治大学の論文
2006-01-30