Title Hyper-chaotic Magnetisation Dynamics of Two Interacting Dipoles
Authors Urzagasti, D., BECERRA ALONSO, DAVID, Perez, L. M., Mancini, H. L., Laroze, D., BECERRA ALONSO, DAVID
External publication No
Means J. Low Temp. Phys.
Scope Article
Nature Científica
JCR Quartile 4
SJR Quartile 2
JCR Impact 0.78700
SJR Impact 0.52500
Area International
Web https://www.scopus.com/inward/record.uri?eid=2-s2.0-84946532303&doi=10.1007%2fs10909-015-1338-2&partnerID=40&md5=e4008f95f484eb783412409e69fb2fcf
Publication date 01/12/2015
ISI 000363956000003
Scopus Id 2-s2.0-84946532303
DOI 10.1007/s10909-015-1338-2
Abstract The present work is a numerical study of the deterministic spin dynamics of two interacting anisotropic magnetic particles in the presence of a time-dependent external magnetic field using the Landau-Lifshitz equation. Particles are coupled through the dipole-dipole interaction. The applied magnetic field is made of a constant longitudinal amplitude component and a time-dependent transversal amplitude component. Dynamical states obtained are represented by their Lyapunov exponents and bifurcation diagrams. The dependence on the largest and the second largest Lyapunov exponents, as a function of the magnitude and frequency of the applied magnetic field, and the relative distance between particles, is studied. The system presents multiple transitions between regular and chaotic behaviour depending on the control parameters. In particular, the system presents consistent hyper-chaotic states.
Keywords Magnetisation dynamics; Dipolar interaction; Hyper-chaos
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