Magnetization self-oscillations induced by spin-polarized currents

Author

Bertotti, G. ; Serpico, C. ; Mayergoyz, I.D. ; Bonin, R. ; Magni, A. ; d´Aquino, M.

Author_Institution

Ist. Elettrotecnico Nazionale Galileo Ferraris, Torino, Italy

Volume

41

Issue

10

fYear

2005

Firstpage

2574

Lastpage

2576

Abstract

The effect of a spin-polarized current on magnetization dynamics is described by the Landau-Lifshitz-Gilbert (LLG) equation with the addition of Slonczewski spin-transfer term. Detailed predictions about the existence, position, and stability of magnetization self-oscillations induced by the spin-polarized current are obtained by an analytical perturbative method for different levels of current injection and externally applied field. The two cases of opposite direction of current flow are discussed.

Keywords

bifurcation; electron spin polarisation; magnetisation; perturbation techniques; LLG equation; Landau-Lifshitz-Gilbert equation; Slonczewski spin-transfer; bifurcation theory; magnetization dynamics; magnetization self-oscillations; perturbative method; spin-polarized current; spin-torque effect; Current density; Damping; Electrons; Equations; Magnetic analysis; Magnetic anisotropy; Nonlinear dynamical systems; Perpendicular magnetic anisotropy; Polarization; Saturation magnetization; Bifurcation theory; Landau–Lifshitz–Gilbert equation; spin-torque effect;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2005.854661

Filename

1519052