Thermally-assisted spin-transfer torque magnetization reversal of uniaxial nanomagnets in energy space

D. Pinna, A. D. Kent, D. L. Stein

    Research output: Contribution to journalArticle

    Abstract

    We propose a new analytical method for studying the asymptotic behavior of switching time as a function of current in macrospins under the effects of both spin-torque and thermal noise by focusing on their diffusive energy space dynamics. We test our method on the well understood uniaxial macrospin model and confirm the switching scaling dependence (I → 0, τ ∞ exp(-ξ(1-I)2)). The analysis also shows that when there is an angle between spin current and magnet's uniaxial axes the mean switching time in the low current limit depends on the spin-current projection on the easy axis, but otherwise has the same functional form as that in the collinear case. These results have implications for modeling the energetics of thermally assisted magnetization reversal of spin transfer magnetic random access memory bit cells.

    Original languageEnglish (US)
    Article number6559142
    Pages (from-to)3144-3146
    Number of pages3
    JournalIEEE Transactions on Magnetics
    Volume49
    Issue number7
    DOIs
    StatePublished - 2013

    Fingerprint

    Magnetization reversal
    Torque
    Thermal noise
    Magnets
    Data storage equipment

    Keywords

    • Magnetic memory
    • micromagnetics
    • spin-transfer magnetic memory
    • thermal noise

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering
    • Electronic, Optical and Magnetic Materials

    Cite this

    Thermally-assisted spin-transfer torque magnetization reversal of uniaxial nanomagnets in energy space. / Pinna, D.; Kent, A. D.; Stein, D. L.

    In: IEEE Transactions on Magnetics, Vol. 49, No. 7, 6559142, 2013, p. 3144-3146.

    Research output: Contribution to journalArticle

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