Magnetic properties of CoPt thin films and nanosized dots patterned by Laser Interference Lithography (LIL)

M.Y. Delalande, A.J. le Fèbre, Hendricus A.G.M. van Wolferen, Leon Abelmann, J.C. Lodder

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademic

    Abstract

    Magnetic properties of Co/Pt multilayers have been extensively studied from both the practical and fundamental points of view. These multilayers have large perpendicular magnetic anisotropy, high remanent squareness and high coercivity [1]. Therefore, Co/Pt multilayer dots are possible candidates for future high-density magnetic storage media. In order to understand the magnetization process, it is essential to measure not only the properties of the array, but also of individual dots. Techniques like micro-SQUID’s can be used to measure on nano dots, however they are limited to cryogenic temperatures [2]. Alternatively, anomalous Hall effect (AHE) measurements are very sensitive and can be operated in a wide temperature range including room temperature. The AHE technique has previously been used to measure L10-FePt [3] and Co/Pt multilayer nanodots [4] and shown that the extremely high sensitivity allows detecting switching behaviour of a sub-100-nm dot. In this work we investigate the magnetic reversal of Co/Pt dots, with a focus on the switching field distribution. The arrays of dots are defined by laser interference lithography (LIL) [5]. LIL offers advantages over scanning electron-beam lithography due to its ability to define grid patterns over large, square cm, areas in a single, fast, maskless exposure.
    Original languageUndefined
    Title of host publicationProceedings of the 12eme Colloque Louis Neel
    Place of PublicationLa grande motte
    PublisherCEMES
    Pages-
    Number of pages1
    ISBN (Print)not assigned
    Publication statusPublished - Oct 2008

    Publication series

    Name
    PublisherCEMES

    Keywords

    • METIS-263693
    • IR-68093
    • EWI-13825
    • TST-uSPAM: micro Scanning Probe Array Memory
    • TST-SMI: Formerly in EWI-SMI

    Cite this

    Delalande, M. Y., le Fèbre, A. J., van Wolferen, H. A. G. M., Abelmann, L., & Lodder, J. C. (2008). Magnetic properties of CoPt thin films and nanosized dots patterned by Laser Interference Lithography (LIL). In Proceedings of the 12eme Colloque Louis Neel (pp. -). La grande motte: CEMES.