Domain wall resistivity in epitaxial thin film microstructures

A. D. Kent, J. Yu, U. Rüdiger, S. S P Parkin

    Research output: Contribution to journalArticle

    Abstract

    This article reviews our recent experimental studies of domain wall (DW) resistivity in epitaxial transition metal ferromagnetic thin film microstructures with stripe domains. The results are presented and analysed in the context of models of DW scattering and conventional magnetoresistance (MR) effects in ferromagnetic metals. Microstructures of progressively higher magnetic anisotropy and thus smaller DW widths have been studied, including; bcc Fe, hcp Co and L1o FePt. The magnetic domain structure of these materials have been investigated using magnetic force microscopy and micromagnetic simulations. In Fe and Co the dominant sources of low-field MR are ferromagnetic resistivity anisotropy, due to both anisotropic MR (AMR) and the Lorentz MR. In Fe, at low temperature, a novel negative DW contribution to the MR has been found. Hcp Co microstructures show a greater resistivity for current perpendicular to DWs than for current parallel to DWs, that is consistent with a small (positive) DW resistivity and a Hall effect mechanism. High anisotropy L1o FePt microstructures show strong evidence for an intrinsic DW contribution to the resistivity. Related studies and future directions are also discussed.

    Original languageEnglish (US)
    JournalJournal of Physics: Condensed Matter
    Volume13
    Issue number25
    DOIs
    StatePublished - Jun 25 2001

    Fingerprint

    Epitaxial films
    Domain walls
    domain wall
    Magnetoresistance
    Thin films
    microstructure
    Microstructure
    electrical resistivity
    thin films
    anisotropy
    Anisotropy
    Enhanced magnetoresistance
    Magnetic force microscopy
    Magnetic domains
    Ferromagnetic materials
    magnetic force microscopy
    Magnetic anisotropy
    Hall effect
    magnetic domains
    Transition metals

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Electronic, Optical and Magnetic Materials

    Cite this

    Domain wall resistivity in epitaxial thin film microstructures. / Kent, A. D.; Yu, J.; Rüdiger, U.; Parkin, S. S P.

    In: Journal of Physics: Condensed Matter, Vol. 13, No. 25, 25.06.2001.

    Research output: Contribution to journalArticle

    Kent, A. D. ; Yu, J. ; Rüdiger, U. ; Parkin, S. S P. / Domain wall resistivity in epitaxial thin film microstructures. In: Journal of Physics: Condensed Matter. 2001 ; Vol. 13, No. 25.
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