Classical spin dynamics of anisotropic Heisenberg dimmers

• Authors: Laura Pérez , Omar Suarez , David Laroze , Hector Mancini
• Languages of publication: EN

Abstracts

EN

In the present work we study the deterministic spin dynamics of two interacting anisotropic magnetic particles in the presence of an external magnetic field using the Landau-Lifshitz equation. The interaction between particles is through the exchange energy. We study both conservative and dissipative cases. In the first one, we characterize the dynamical behavior of the system by monitoring the Lyapunov exponents and bifurcation diagrams. In particular, we explore the dependence of the largest Lyapunov exponent respect to the magnitude of applied magnetic field and exchange constant. We find that the system presents multiple transitions between regular and chaotic behaviors. We show that the dynamical phases display a very complicated topology of intricately intermingled chaotic and regular regions. In the dissipative case, we calculate the final saturation states as a function of the magnitude of the applied magnetic field, exchange constant as well as the anisotropy constants.

Keywords

EN

magnetization dynamics; chaos; Lyapunov exponents

• Publisher: De Gruyter Open
• Journal: Open Physics
• Year: 2013
• Volume: 11
• Issue: 12
• Pages: 1629-1637

Dates

published

1 - 12 - 2013

online

20 - 12 - 2013

Contributors

author

Laura Pérez

• Departamento de Física y Matemática Aplicada, Universidad de Navarra, Pamplona, 31080, Spain

author

Omar Suarez

• Instituto de Alta Investigación, Universidad de Tarapacá, Arica, Casilla 7D, Chile

author

David Laroze

author

Hector Mancini

• Departamento de Física y Matemática Aplicada, Universidad de Navarra, Pamplona, 31080, Spain

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Identifiers

DOI

10.2478/s11534-013-0280-7