Title :
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
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;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2005.854661
