Detalle Publicación

ARTÍCULO
Effect of anisotropies on the magnetization dynamics
Autores: Pérez, L. M. ; Bragard Monier, Jean; Mancini Maza, Héctor Luis; Gallas, J. A. C.; Cabanas, A. M.; Suárez, O. J.; Laroze, D.
Título de la revista: NETWORKS AND HETEROGENEOUS MEDIA
ISSN: 1556-1801
Volumen: 10
Número: 1 Supl. 1
Páginas: 209 - 221
Fecha de publicación: 2015
Resumen:
We report a systematic investigation of the magnetic anisotropy effects observed in the deterministic spin dynamics of a magnetic particle in the presence of a time-dependent magnetic field. The system is modeled by the Landau-Lifshitz-Gilbert equation and the magnetic field consists of two terms, a constant term and a term involving a harmonic time modulation. We consider a general quadratic anisotropic energy with three different preferential axes. The dynamical behavior of the system is represented in Lyapunov phase diagrams, and by calculating bifurcation diagrams, Poincare sections and Fourier spectra. We find an intricate distribution of shrimp-shaped regular island embedded in wide chaotic phases. Anisotropy effects are found to play a key role in defining the symmetries of regular and chaotic stability phases.