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Groenland, J.P.J. and Abelmann, L.
(2007)
Two-dimensional data detection for probe recording on patterned media.
In: Abstracts of the 10th Joint MMM/Intermag Conference 2007, 7-11 Jan 2007, Baltimore, MD, USA.
pp. 428-428.
American Institute of Physics.
ISBN not assigned
Full text available as:
 AbstractThe effect of intertrack intersymbol interference in a magnetic patterned medium is studied. A two-dimensional (2D) channel code is proposed, dedicated to perpendicularly magnetized media without soft underlayer, which exhibit read pulses showing overshoot. Read pulse shapes were investigated using a magnetic-force microscope tip scanning the patterned medium row-by-row. To test different codes, a bit-detection simulation program was developed to generate large amounts of data on which bit error rates can be measured. Application of the 2D channel code, which implies recording of particular dot positions with fixed bits ("ones", "zeros"), resulted in the elimination of 2D worst-case bit patterns and a subsequent reduction of detected-bit errors. The accompanying redundancy of 22% is inevitable for this type of 2D code.
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