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

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

Resumen

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.

Idioma originalInglés
Número de artículo105674
PublicaciónCommunications in Nonlinear Science and Numerical Simulation
Volumen96
DOI
EstadoPublicada - may 2021
Publicado de forma externa

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