Two-dimensional data detection for probe recording on patterned media

J.P.J. Groenland, Leon Abelmann

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    Abstract

    The 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.
    Original languageUndefined
    Title of host publicationAbstracts of the 10th Joint MMM/Intermag Conference 2007
    Place of PublicationMelville, NY, USA
    PublisherAmerican Institute of Physics
    Pages428-428
    Number of pages1
    ISBN (Print)not assigned
    Publication statusPublished - Jan 2007
    Event10th Joint MMM–Intermag Conference 2007 - Waterfront Marriott , Baltimore, United States
    Duration: 7 Jan 200711 Jan 2007
    Conference number: 10

    Publication series

    Name
    PublisherAmerican Institute of Physics
    Number2

    Conference

    Conference10th Joint MMM–Intermag Conference 2007
    CountryUnited States
    CityBaltimore
    Period7/01/0711/01/07
    OtherJoint meeting of the annual Magnetism and Magnetic Materials Conference and the annual Intermag Conference

    Keywords

    • TST-SMI: Formerly in EWI-SMI
    • TST-uSPAM: micro Scanning Probe Array Memory
    • intertrack interference
    • EWI-9110
    • METIS-242035
    • Magnetic force microscopy
    • Two-dimensional coding
    • Patterned Media
    • perpendicular magnetic recording
    • IR-66882

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