论文信息 - Magnetization dynamics driven by spin-polarized current in nanomagnets

Magnetization dynamics driven by spin-polarized current in nanomagnets

Abstract In this report, micromagnetic simulations of magnetization dynamics driven by spin-polarized currents (SPCs) on magnetic nanopillars of permalloy/Cu/permalloy with different rectangular cross-sections are presented. Complete dynamical stability diagrams from initial parallel and antiparallel states have been computed for 100 ns. The effects of a space-dependent polarization function together with the presence of magnetostatic coupling from the fixed layer and classical Ampere field have been taken into account.

[1] Robert M. White,et al. Spin transfer excited regular and chaotic spin waves in current perpendicular to plane spin valves , 2004 .

[2] Berger. Emission of spin waves by a magnetic multilayer traversed by a current. , 1996, Physical review. B, Condensed matter.

[3] J. Slonczewski. Current-driven excitation of magnetic multilayers , 1996 .

[4] Bernard Dieny,et al. Excitations of incoherent spin-waves due to spin-transfer torque , 2004, Nature materials.

[5] D. V. Berkov,et al. Magnetization precession due to a spin-polarized current in a thin nanoelement: Numerical simulation study , 2005 .

[6] G. Bertotti,et al. Magnetization switching and microwave oscillations in nanomagnets driven by spin-polarized currents. , 2005, Physical review letters.

[7] D. Ralph,et al. Microwave oscillations of a nanomagnet driven by a spin-polarized current , 2003, Nature.

[8] G. Finocchio,et al. Effect of the classical ampere field in micromagnetic computations of spin polarized current-driven magnetization processes , 2005 .