Magnetic viscosity of recording media(alumite) with perpendicular anisotropy

Phan Le Kim, Cock Lodder

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

    Abstract

    In this paper, we will present a study on magnetic viscosity of alumite perpendicular media at different thicknesses. Viscosity as a function of applied field(viscosity curve) exhibits a short plateau at low field and then decreases monotonously with increasing field. After correcting for the demagnetizing field, the shape of the intrinsic viscosity curves changes to the well-known shape of viscosity curve of in-plane media, i.e. they have a peak near H_c. The intrinsic viscosity curves obtained from experiments were fitted to an analytical model of Chantrell et al. [1], from which, we found that the effective switching volumes obtained by fitting are much smaller than the column volumes, indicating that the reversal mechanism is incoherent.
    Original languageEnglish
    Title of host publicationThird Asian Symposium on Information Storage Technology, ASIST-3
    Place of PublicationSingapore
    PublisherInstitute of Image Information and Television Engineers
    Pages81-88
    Number of pages8
    DOIs
    Publication statusPublished - 25 Feb 1999
    Event3rd Asian Symposium on Information Storage Technology, ASIST 1999 - Singapore, Singapore
    Duration: 1 Feb 1999 → 2 Feb 1999
    Conference number: 3

    Publication series

    NameITE Technical Report
    PublisherThe Institute of Image Information and Television Engineers
    Number15
    Volume23
    ISSN (Print)1342-6893

    Conference

    Conference3rd Asian Symposium on Information Storage Technology, ASIST 1999
    Abbreviated titleASIST
    CountrySingapore
    CitySingapore
    Period1/02/99 → 2/02/99

    Keywords

    • Perpendicular media
    • Alumite
    • Time-dependence effects
    • Viscosity
    • Activation volume
    • Reversal mechanism

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      • Cite this

      Le Kim, P., & Lodder, C. (1999). Magnetic viscosity of recording media(alumite) with perpendicular anisotropy. In Third Asian Symposium on Information Storage Technology, ASIST-3 (pp. 81-88). (ITE Technical Report; Vol. 23, No. 15). Singapore: Institute of Image Information and Television Engineers. https://doi.org/10.11485/itetr.23.15.0_81