Electrical measurement of magnetic-field-impeded polarity switching of a ferromagnetic vortex core

Manu Sushruth, Jaspar Fried, A. Anane, S. Xavier, C. Deranlot, Mikhail Kostylev, V. Cros, Peter Metaxas

    Research output: Contribution to journalArticle

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    Abstract

    © 2016 American Physical Society. Vortex core polarity switching in NiFe disks has been evidenced using an all-electrical magnetoresistive rectification scheme. Simulation and experiments yield a consistent rectified signal loss when driving core gyration at high powers. With increasing power, the frequency range over which the loss occurs grows and the resonance downshifts in frequency, consistent with nonlinear core dynamics and periodic core polarity switching induced by the core reaching its critical velocity. Core-polarity-dependent rectification signals enable an independent verification of the switched core polarity. We also demonstrate the ability to impede core polarity switching by displacing the core towards the disk's edge where an increased core stiffness reduces the core velocity.
    Original languageEnglish
    Pages (from-to)100402-1 - 100402-5
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume94
    Issue number10
    DOIs
    Publication statusPublished - 8 Sep 2016

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    electrical measurement
    polarity
    Vortex flow
    vortices
    Magnetic fields
    magnetic fields
    Stiffness
    rectification
    Experiments
    critical velocity
    gyration
    stiffness
    frequency ranges

    Cite this

    Sushruth, Manu ; Fried, Jaspar ; Anane, A. ; Xavier, S. ; Deranlot, C. ; Kostylev, Mikhail ; Cros, V. ; Metaxas, Peter. / Electrical measurement of magnetic-field-impeded polarity switching of a ferromagnetic vortex core. In: Physical Review B - Condensed Matter and Materials Physics. 2016 ; Vol. 94, No. 10. pp. 100402-1 - 100402-5.
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    Electrical measurement of magnetic-field-impeded polarity switching of a ferromagnetic vortex core. / Sushruth, Manu; Fried, Jaspar; Anane, A.; Xavier, S.; Deranlot, C.; Kostylev, Mikhail; Cros, V.; Metaxas, Peter.

    In: Physical Review B - Condensed Matter and Materials Physics, Vol. 94, No. 10, 08.09.2016, p. 100402-1 - 100402-5.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Electrical measurement of magnetic-field-impeded polarity switching of a ferromagnetic vortex core

    AU - Sushruth, Manu

    AU - Fried, Jaspar

    AU - Anane, A.

    AU - Xavier, S.

    AU - Deranlot, C.

    AU - Kostylev, Mikhail

    AU - Cros, V.

    AU - Metaxas, Peter

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    N2 - © 2016 American Physical Society. Vortex core polarity switching in NiFe disks has been evidenced using an all-electrical magnetoresistive rectification scheme. Simulation and experiments yield a consistent rectified signal loss when driving core gyration at high powers. With increasing power, the frequency range over which the loss occurs grows and the resonance downshifts in frequency, consistent with nonlinear core dynamics and periodic core polarity switching induced by the core reaching its critical velocity. Core-polarity-dependent rectification signals enable an independent verification of the switched core polarity. We also demonstrate the ability to impede core polarity switching by displacing the core towards the disk's edge where an increased core stiffness reduces the core velocity.

    AB - © 2016 American Physical Society. Vortex core polarity switching in NiFe disks has been evidenced using an all-electrical magnetoresistive rectification scheme. Simulation and experiments yield a consistent rectified signal loss when driving core gyration at high powers. With increasing power, the frequency range over which the loss occurs grows and the resonance downshifts in frequency, consistent with nonlinear core dynamics and periodic core polarity switching induced by the core reaching its critical velocity. Core-polarity-dependent rectification signals enable an independent verification of the switched core polarity. We also demonstrate the ability to impede core polarity switching by displacing the core towards the disk's edge where an increased core stiffness reduces the core velocity.

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