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2013 | 11 | 12 | 1629-1637
Article title

Classical spin dynamics of anisotropic Heisenberg dimmers

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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.
Publisher

Journal
Year
Volume
11
Issue
12
Pages
1629-1637
Physical description
Dates
published
1 - 12 - 2013
online
20 - 12 - 2013
Contributors
author
  • Departamento de Física y Matemática Aplicada, Universidad de Navarra, Pamplona, 31080, Spain
author
  • Instituto de Alta Investigación, Universidad de Tarapacá, Arica, Casilla 7D, Chile
author
  • Departamento de Física y Matemática Aplicada, Universidad de Navarra, Pamplona, 31080, Spain, hmancini@unav.es
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Identifiers
YADDA identifier
bwmeta1.element.-psjd-doi-10_2478_s11534-013-0280-7
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