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 journalArticlepeer-review

    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

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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