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High Recording Density Tape Using Fine Barium-Ferrite Particles With Improved Thermal Stability

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5 Author(s)
Matsumoto, A. ; Recording Media Res. Labs., FUJIFILM Corp., Odawara, Japan ; Murata, Y. ; Musha, A. ; Matsubaguchi, S.
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The effects of reducing barium-ferrite magnetic particle volume have been studied. We optimized barium-ferrite substitution elements and their amount and demonstrated thermal stability for very fine particles of the size 1.5 ?? 103 nm3. Using a giant magnetoresistive (GMR) head with a 0.2 ??m read track width, test tape containing these fine particles exhibited a bit error rate of 1.5 ??10-4 at a linear density of 360 kbpi using a noise predictive maximum likelihood (NPML) detection for nonstationary noise sources, i.e., data-dependent noise. This corresponds to a 15 Gb/in2 areal recording density in linear tape application.

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Magnetics, IEEE Transactions on  (Volume:46 ,  Issue: 5 )