Thermally assisted spin-transfer torque dynamics in energy space

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

    Research output: Contribution to journalArticle

    Abstract

    We consider the general Landau-Lifshitz-Gilbert theory underlying the magnetization dynamics of a macrospin magnet subject to spin-torque effects and thermal fluctuations. Thermally activated dynamical properties are analyzed by averaging the full magnetization equations over constant-energy orbits. After averaging, all the relevant dynamical scenarios are a function of the ratio between hard and easy axis anisotropies. We derive analytically the range of currents for which limit cycles exist and discuss the regimes in which the constant energy orbit averaging technique is applicable.

    Original languageEnglish (US)
    Article number104405
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume88
    Issue number10
    DOIs
    StatePublished - Sep 9 2013

    Fingerprint

    torque
    Magnetization
    Orbits
    Torque
    orbits
    magnetization
    Magnets
    Anisotropy
    magnets
    anisotropy
    cycles
    energy
    Hot Temperature

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Electronic, Optical and Magnetic Materials

    Cite this

    Thermally assisted spin-transfer torque dynamics in energy space. / Pinna, D.; Kent, A. D.; Stein, D. L.

    In: Physical Review B - Condensed Matter and Materials Physics, Vol. 88, No. 10, 104405, 09.09.2013.

    Research output: Contribution to journalArticle

    @article{7209d2e84c8343efb9c99ceed11151b3,
    title = "Thermally assisted spin-transfer torque dynamics in energy space",
    abstract = "We consider the general Landau-Lifshitz-Gilbert theory underlying the magnetization dynamics of a macrospin magnet subject to spin-torque effects and thermal fluctuations. Thermally activated dynamical properties are analyzed by averaging the full magnetization equations over constant-energy orbits. After averaging, all the relevant dynamical scenarios are a function of the ratio between hard and easy axis anisotropies. We derive analytically the range of currents for which limit cycles exist and discuss the regimes in which the constant energy orbit averaging technique is applicable.",
    author = "D. Pinna and Kent, {A. D.} and Stein, {D. L.}",
    year = "2013",
    month = "9",
    day = "9",
    doi = "10.1103/PhysRevB.88.104405",
    language = "English (US)",
    volume = "88",
    journal = "Physical Review B-Condensed Matter",
    issn = "1098-0121",
    publisher = "American Physical Society",
    number = "10",

    }

    TY - JOUR

    T1 - Thermally assisted spin-transfer torque dynamics in energy space

    AU - Pinna, D.

    AU - Kent, A. D.

    AU - Stein, D. L.

    PY - 2013/9/9

    Y1 - 2013/9/9

    N2 - We consider the general Landau-Lifshitz-Gilbert theory underlying the magnetization dynamics of a macrospin magnet subject to spin-torque effects and thermal fluctuations. Thermally activated dynamical properties are analyzed by averaging the full magnetization equations over constant-energy orbits. After averaging, all the relevant dynamical scenarios are a function of the ratio between hard and easy axis anisotropies. We derive analytically the range of currents for which limit cycles exist and discuss the regimes in which the constant energy orbit averaging technique is applicable.

    AB - We consider the general Landau-Lifshitz-Gilbert theory underlying the magnetization dynamics of a macrospin magnet subject to spin-torque effects and thermal fluctuations. Thermally activated dynamical properties are analyzed by averaging the full magnetization equations over constant-energy orbits. After averaging, all the relevant dynamical scenarios are a function of the ratio between hard and easy axis anisotropies. We derive analytically the range of currents for which limit cycles exist and discuss the regimes in which the constant energy orbit averaging technique is applicable.

    UR - http://www.scopus.com/inward/record.url?scp=84884859413&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=84884859413&partnerID=8YFLogxK

    U2 - 10.1103/PhysRevB.88.104405

    DO - 10.1103/PhysRevB.88.104405

    M3 - Article

    VL - 88

    JO - Physical Review B-Condensed Matter

    JF - Physical Review B-Condensed Matter

    SN - 1098-0121

    IS - 10

    M1 - 104405

    ER -