Observation of droplet soliton drift resonances in a spin-transfer-torque nanocontact to a ferromagnetic thin film

S. Lendínez, N. Statuto, D. Backes, A. D. Kent, F. MacIà

    Research output: Contribution to journalArticle

    Abstract

    Magnetic droplet solitons are nonlinear dynamical modes that can be excited in a thin film with perpendicular magnetic anisotropy with a spin-transfer torque. Although droplet solitons have been proved to be stable with a hysteretic response to applied currents and magnetic fields at low temperature, measurements at room temperature indicate less stability and reduced hysteresis width. Here, we report evidence of droplet soliton drift instabilities, leading to drift resonances, at room temperature that explains their lower stability. Micromagnetic simulations show that the drift instability is produced by an effective-field asymmetry in the nanocontact region that can have different origins.

    Original languageEnglish (US)
    Article number174426
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume92
    Issue number17
    DOIs
    StatePublished - Nov 30 2015

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics

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