Two-dimensional coding for probe recording on magnetic patterned media

Hans Groenland, Leon Abelmann

    Research output: Contribution to journalArticleAcademicpeer-review

    18 Citations (Scopus)
    111 Downloads (Pure)


    The effect of intertrack intersymbol interference in a magnetic patterned medium is studied. A two-dimensional (2-D) 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 2-D channel code, which implies recording of particular dot positions with fixed bits ("ones", "zeros"), resulted in the elimination of 2-D worst-case bit patterns and a subsequent reduction of detected-bit errors. The accompanying redundancy of 22% is inevitable for this type of 2-D code.
    Original languageEnglish
    Pages (from-to)2307-2309
    Number of pages3
    JournalIEEE transactions on magnetics
    Issue number1, suppl. 6
    Publication statusPublished - Jun 2007


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


    Dive into the research topics of 'Two-dimensional coding for probe recording on magnetic patterned media'. Together they form a unique fingerprint.

    Cite this