L. Pérez, J. Bragard, H. Mancini, J. Gallas, A. M. Cabanas, O. Suarez, D. Laroze
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引用次数: 10
Abstract
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.
期刊介绍：
NHM offers a strong combination of three features: Interdisciplinary character, specific focus, and deep mathematical content. Also, the journal aims to create a link between the discrete and the continuous communities, which distinguishes it from other journals with strong PDE orientation.
NHM publishes original contributions of high quality in networks, heterogeneous media and related fields. NHM is thus devoted to research work on complex media arising in mathematical, physical, engineering, socio-economical and bio-medical problems.
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