Direct Observation of a Localized Magnetic Soliton in a Spin-Transfer Nanocontact

D. Backes, F. Macià, S. Bonetti, R. Kukreja, H. Ohldag, A. D. Kent

    Research output: Contribution to journalArticle

    Abstract

    We report the direct observation of a localized magnetic soliton in a spin-transfer nanocontact using scanning transmission x-ray microscopy. Experiments are conducted on a lithographically defined 150 nm diameter nanocontact to an ultrathin ferromagnetic multilayer with perpendicular magnetic anisotropy. Element-resolved x-ray magnetic circular dichroism images show an abrupt onset of a magnetic soliton excitation localized beneath the nanocontact at a threshold current. However, the amplitude of the excitation ≃25° at the contact center is far less than that predicted (≳180°), showing that the spin dynamics is not described by existing models.

    Original languageEnglish (US)
    Article number127205
    JournalPhysical Review Letters
    Volume115
    Issue number12
    DOIs
    StatePublished - Sep 17 2015

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    solitary waves
    spin dynamics
    threshold currents
    dichroism
    excitation
    x rays
    microscopy
    anisotropy
    scanning

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

    Cite this

    Backes, D., Macià, F., Bonetti, S., Kukreja, R., Ohldag, H., & Kent, A. D. (2015). Direct Observation of a Localized Magnetic Soliton in a Spin-Transfer Nanocontact. Physical Review Letters, 115(12), [127205]. https://doi.org/10.1103/PhysRevLett.115.127205

    Direct Observation of a Localized Magnetic Soliton in a Spin-Transfer Nanocontact. / Backes, D.; Macià, F.; Bonetti, S.; Kukreja, R.; Ohldag, H.; Kent, A. D.

    In: Physical Review Letters, Vol. 115, No. 12, 127205, 17.09.2015.

    Research output: Contribution to journalArticle

    Backes, D, Macià, F, Bonetti, S, Kukreja, R, Ohldag, H & Kent, AD 2015, 'Direct Observation of a Localized Magnetic Soliton in a Spin-Transfer Nanocontact', Physical Review Letters, vol. 115, no. 12, 127205. https://doi.org/10.1103/PhysRevLett.115.127205
    Backes, D. ; Macià, F. ; Bonetti, S. ; Kukreja, R. ; Ohldag, H. ; Kent, A. D. / Direct Observation of a Localized Magnetic Soliton in a Spin-Transfer Nanocontact. In: Physical Review Letters. 2015 ; Vol. 115, No. 12.
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