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The European Physical Journal B

, Volume 59, Issue 4, pp 435–445 | Cite as

Analytical study of magnetization dynamics driven by spin-polarized currents

  • R. BoninEmail author
  • C. Serpico
  • G. Bertotti
  • I. D. Mayergoyz
  • M. d'Aquino
Topical Issue on New Trends in Spin Transfer Physics

Abstract.

An analytical approach is presented for the study of magnetization dynamics driven by spin-polarized currents. Two cases are considered: (i) magnetic layers with in-plane uniaxial anisotropy; (ii) magnetic layers with uniaxial anisotropy and applied field perpendicular to the layer plane. Theoretical predictions are obtained for the existence of stationary modes and self-oscillations of magnetization by solving the deterministic Landau-Lifshitz-Gilbert equation with Slonczewski spin-torque term. Thermal fluctuations are studied by deriving the corresponding Fokker-Planck equation for the magnetization probability distribution. Analytical procedures to estimate the effective potential barrier separating self-oscillatory regimes and/or stationary modes are proposed.

PACS.

75.60.Jk Magnetization reversal mechanisms 85.70.Kh Magnetic thin film devices: magnetic heads 

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Copyright information

© EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2007

Authors and Affiliations

  • R. Bonin
    • 1
    Email author
  • C. Serpico
    • 2
  • G. Bertotti
    • 1
  • I. D. Mayergoyz
    • 3
  • M. d'Aquino
    • 4
  1. 1.Istituto Nazionale di Ricerca Metrologica, Strada delle Cacce 91TorinoItaly
  2. 2.Dipartimento di Ingegneria ElettricaUniversità di Napoli “Federico II”NapoliItaly
  3. 3.Department of Electrical and Computer EngineeringUniversity of MarylandCollege ParkUSA
  4. 4.Dipartimento per le TecnologieUniversità di Napoli “Parthenope”NapoliItaly

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