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Effects of polymeric substrate roughness on head-medium spacing and recording properties of sputtered magnetic tape

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3 Author(s)
Hwan-Soo Lee ; Data Storage Syst. Center, Carnegie Mellon Univ., Pittsburgh, PA, USA ; Bain, J.A. ; Laughlin, D.E.

We investigated the spacing dependence of recording characteristics on head-medium spacing due to the surface roughness of substrates. CoCrPt-sputtered tape media with a magnetic thickness of 25 nm were deposited onto polymeric substrates possessing very different roughnesses for this investigation. The degradation in the write and read processes due to spacing was a significant limiting factor at high densities. By utilizing smooth polymeric substrates, a substantial improvement in system bandwidth as well as effective write field gradient can be achieved. As a result, overwrite performance was also considerably improved over the frequency range of interest.

Published in:

Magnetics, IEEE Transactions on  (Volume:41 ,  Issue: 9 )

Date of Publication:

Sept. 2005

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