Current-induced transverse spin-wave instability in thin ferromagnets: Beyond linear stability analysis

2005/08/30 by Shaffique Adam, M. L. Polianski, Mikhail L. Polianski +1 · 19 citations
Mathematics · Physics and Astronomy · #Amplitude #Chaotic #Condensed matter physics #Discretization #Ferromagnetism #Instability #Magnetic field #Magnetic properties of thin films #Magnetization #Mathematics #Mechanics #Nanomagnet #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum electrodynamics #Quantum mechanics #Spin wave #cond-mat.mes-hall #cond-mat.mtrl-sci

paper · pdf · doi:10.1103/physrevb.73.024425

published in Physical Review B 73(2) (American Physical Society) · 14 pages, 10 figures; revtex4

arxiv created 2005/08/30 · openalex publication_date 2006/01/27 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

A sufficiently large unpolarized current can cause a spin-wave instability in thin nanomagnets with asymmetric contacts. The dynamics beyond the instability is understood in the perturbative regime of small spin-wave amplitudes, as well as by numerically solving a discretized model. In the absence of an applied magnetic field, our numerical simulations reveal a hierarchy of instabilities, leading to chaotic magnetization dynamics for the largest current densities we consider.

Citations

• Current-driven excitation of magnetic multilayers
• Thermally assisted magnetization reversal in the presence of a spin-transfer torque
• Magnetization dynamics with a spin-transfer torque
• Current-Induced Transverse Spin-Wave Instability in a Thin Nanomagnet
• Current-induced macrospin versus spin-wave excitations in spin valves
• Microwave oscillations of a nanomagnet driven by a spin-polarized current
• Current-induced magnetization reversal in magnetic nanowires

Cited by

• Model for a collimated spin-wave beam generated by a single-layer spin torque nanocontact