2020/12/29 by Mónica A. García-Ñustes, Fernando R. Humire, Alejandro O. Leon +1 · 7 citations
Computer Science · Physics and Astronomy · #Anisotropy #Condensed matter physics #Dissipative system #Landau–Lifshitz–Gilbert equation #Magnetic field #Magnetic properties of thin films #Magnetization #Nonlinear Dynamics and Pattern Formation #Phase (matter) #Phase diagram #Physics #Quantum mechanics #Theoretical and Computational Physics #msc:65Z05 #nlin.AO
paper · pdf · doi:10.1016/j.cnsns.2020.105674
published in Communications in Nonlinear Science and Numerical Simulation 96, 105674 (Elsevier BV) · 16 pages, 5 figures
openalex publication_date 2020/12/29 · openalex created_date 2021/01/05 · arxiv created 2021/01/13 · arxiv updated 2021/01/14 · openalex updated_date 2026/08/05
In magnetic films driven by spin-polarized currents, the perpendicular-to-plane anisotropy is equivalent to breaking the time translation symmetry, i.e., to a parametric pumping. In this work, we numerically study those current-driven magnets via the Landau-Lifshitz-Gilbert-Slonczewski equation in one spatial dimension. We consider a space-dependent anisotropy field in the parametric-like regime. The anisotropy profile is antisymmetric to the middle point of the system. We find several dissipative states and dynamical behavior and focus on localized patterns that undergo oscillatory and phase instabilities. Using numerical simulations, we characterize the localized states' bifurcations and present the corresponding diagram of phases.