Reconfigurable magnetic domain wall pinning using vortex-generated magnetic fields

Aaron Hurst, Joshua Izaac, Fouzia Altaf, Vincent Baltz, Peter Metaxas

    Research output: Contribution to journalArticle

    • 2 Citations

    Abstract

    Although often important for domain wall device applications, reproducible fabrication of pinning sites at the nano-scale remains challenging. Here, we demonstrate that the stray magnetic field generated beneath magnetic vortex cores can be used to generate localized pinning sites for magnetic domain walls in an underlying, perpendicularly magnetized nanostrip. Moreover, we show that the pinning strength can be tuned by switching the vortex core polarity: switching the core polarity so that it is aligned with the magnetization of the expanding domain (rather than against it) can reduce the vortex-mediated wall depinning field by between 40% and 90%, depending on the system geometry. Significant reductions in the depinning field are also demonstrated in narrow strips by shifting the core away from the strips' centers.
    LanguageEnglish
    Number of pages6
    JournalApplied Physics Letters
    Volume110
    Issue number18
    Early online date2 May 2017
    DOIs
    StatePublished - 2017

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    magnetic domains
    domain wall
    vortices
    magnetic fields
    strip
    polarity
    magnetization
    fabrication
    geometry

    Cite this

    Hurst, Aaron ; Izaac, Joshua ; Altaf, Fouzia ; Baltz, Vincent ; Metaxas, Peter. / Reconfigurable magnetic domain wall pinning using vortex-generated magnetic fields. In: Applied Physics Letters. 2017 ; Vol. 110, No. 18.
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    title = "Reconfigurable magnetic domain wall pinning using vortex-generated magnetic fields",
    abstract = "Although often important for domain wall device applications, reproducible fabrication of pinning sites at the nano-scale remains challenging. Here, we demonstrate that the stray magnetic field generated beneath magnetic vortex cores can be used to generate localized pinning sites for magnetic domain walls in an underlying, perpendicularly magnetized nanostrip. Moreover, we show that the pinning strength can be tuned by switching the vortex core polarity: switching the core polarity so that it is aligned with the magnetization of the expanding domain (rather than against it) can reduce the vortex-mediated wall depinning field by between 40{\%} and 90{\%}, depending on the system geometry. Significant reductions in the depinning field are also demonstrated in narrow strips by shifting the core away from the strips' centers.",
    author = "Aaron Hurst and Joshua Izaac and Fouzia Altaf and Vincent Baltz and Peter Metaxas",
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    Reconfigurable magnetic domain wall pinning using vortex-generated magnetic fields. / Hurst, Aaron; Izaac, Joshua; Altaf, Fouzia; Baltz, Vincent ; Metaxas, Peter.

    In: Applied Physics Letters, Vol. 110, No. 18, 2017.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Reconfigurable magnetic domain wall pinning using vortex-generated magnetic fields

    AU - Hurst,Aaron

    AU - Izaac,Joshua

    AU - Altaf,Fouzia

    AU - Baltz,Vincent

    AU - Metaxas,Peter

    PY - 2017

    Y1 - 2017

    N2 - Although often important for domain wall device applications, reproducible fabrication of pinning sites at the nano-scale remains challenging. Here, we demonstrate that the stray magnetic field generated beneath magnetic vortex cores can be used to generate localized pinning sites for magnetic domain walls in an underlying, perpendicularly magnetized nanostrip. Moreover, we show that the pinning strength can be tuned by switching the vortex core polarity: switching the core polarity so that it is aligned with the magnetization of the expanding domain (rather than against it) can reduce the vortex-mediated wall depinning field by between 40% and 90%, depending on the system geometry. Significant reductions in the depinning field are also demonstrated in narrow strips by shifting the core away from the strips' centers.

    AB - Although often important for domain wall device applications, reproducible fabrication of pinning sites at the nano-scale remains challenging. Here, we demonstrate that the stray magnetic field generated beneath magnetic vortex cores can be used to generate localized pinning sites for magnetic domain walls in an underlying, perpendicularly magnetized nanostrip. Moreover, we show that the pinning strength can be tuned by switching the vortex core polarity: switching the core polarity so that it is aligned with the magnetization of the expanding domain (rather than against it) can reduce the vortex-mediated wall depinning field by between 40% and 90%, depending on the system geometry. Significant reductions in the depinning field are also demonstrated in narrow strips by shifting the core away from the strips' centers.

    U2 - 10.1063/1.4982237

    DO - 10.1063/1.4982237

    M3 - Article

    VL - 110

    JO - APPLIED PHYSICS LETTERS

    T2 - APPLIED PHYSICS LETTERS

    JF - APPLIED PHYSICS LETTERS

    SN - 0003-6951

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