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Precise Measurement of the Transition Curvature in Magnetic Recording

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4 Author(s)
Wen-Chin Lin ; Dept. of Electr. & Comput. Eng., Carnegie Mellon Univ., Pittsburgh, PA, USA ; Jian-Gang Zhu ; Yiming Wang ; Seigler, M.

Using spin-stand, the bit transition curvature is underestimated due to the insufficient spatial resolution along the cross-track direction. The approximation of the transition curvature of the magnetic recording can be improved by integrating multiple 2-D scans available to a spin-stand system or a drag tester. Each 2-D magnetic image is scanned with different skew angles of the read head. The sufficient integration is then achieved by maximizing the magnitude of the frequency images in the Fourier domain associated with the scanned images in their spatial domain. The best spatial resolution in different directions due to different skew angles is consequently conserved and further combined into a restored image. 2-D scans with skew angles which match the angle of the transition curve generate the best approximation of the curvature by applying this integration technique.

Published in:

Magnetics, IEEE Transactions on  (Volume:47 ,  Issue: 10 )

Date of Publication:

Oct. 2011

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