Dynamic domain motion of thermal-magnetically formed marks on CoNi/Pt multilayers

Li Zhang, James A. Bain, Jian-Gang Zhu, Leon Abelmann, T. Onoue

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    Abstract

    We characterized a method of heat-assisted magnetic recording, which is potentially suitable for probe-based storage systems. The field emission current from a scanning tunneling microscope tip was used as the heating source. Various pulse voltages were applied to two types of CoNi/Pt multilayered films: one is strongly coupled with low coercivity, and the other is weakly coupled with high coercivity. Experimental results show that marks achieved in strongly coupled medium are larger than that in granular one. An external magnetic field was then applied to those marks. For weak fields (lower than the coercivity of the medium) the size of marks changes distinctly in the strongly coupled medium but not in the granular one. A model of magnetic domain dynamics is built to quantitatively explain the experimental results. It agrees with experiments. Based on this model, we will be able to figure out the proposals to achieve small marks for ultrahigh recording density. © 2006 American Institute of Physics.
    Original languageUndefined
    Article number10.1063/1.2336505
    Pages (from-to)1-5
    Number of pages5
    JournalJournal of Applied Physics
    Volume100
    Issue number053901
    DOIs
    Publication statusPublished - 1 Sep 2006

    Keywords

    • METIS-237860
    • EWI-8908
    • IR-66823
    • TST-SMI: Formerly in EWI-SMI
    • TST-uSPAM: micro Scanning Probe Array Memory

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