Self-organization in the one-dimensional Landau–Lifshitz–Gilbert–Slonczewski equation with non-uniform anisotropy fields

MONICA AMPARO GARCIA ÑUSTES, Fernando R. Humire, Alejandro O. Leon

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish
Article number105674
JournalCommunications in Nonlinear Science and Numerical Simulation
Volume96
DOIs
StatePublished - May 2021
Externally publishedYes

Keywords

  • Magnetic films
  • Non-linear dynamics
  • Pattern formation

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