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Medium noise and grain size analysis of CoCrPt/Ti perpendicular media with NiAl seed layer

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8 Author(s)
Y. Ikeda ; IBM Almaden Res. Center, San Jose, CA, USA ; Y. Sonobe ; G. Zeltzer ; B. K. Yen
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Perpendicular medium with an average grain size of 8.2 nm have been produced by using a-CoCrPt/Ti/NiAl tri-layer structure. The signal-to-noise ratio for the tri-layer medium is 2-7 dB higher than CoCrPt/Ti bi-layer medium at low deposition temperatures. The medium noise is dominated by dc noise and exhibits little transition noise for densities less than 500 kFCI. The ultra-small grain size will improve the performance of perpendicular media for future high-density recording applications

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IEEE Transactions on Magnetics  (Volume:37 ,  Issue: 4 )