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Chaotic dynamics from coupled magnetic monodomain and Josephson current by A. E. Botha; Yu. M. Shukrinov; J. Tekić; M. R. Kolahchi is a Physics and Astronomy article available to read on EtoBox.

What is Chaotic dynamics from coupled magnetic monodomain and Josephson current about?

The ordinary (superconductor-insulator-superconductor) Josephson junction cannot exhibit chaos in the absence of an external ac drive, whereas in the superconductor-ferromagnet-superconductor Josephson junction, known as the φ 0 junction, the magnetic layer effectively provides two extra degrees of freedom that can facilitate chaotic dynamics in the resulting four-dimensional autonomous system. In this work, we use the Landau-Lifshitz-Gilbert model for the magnetic moment of the ferromagnetic weak link, while the Josephson junction is described by the resistively capacitively shunted-junction model. We study the chaotic dynamics of the system for parameters surrounding the ferromagnetic resonance region, i.e., for which the Josephson frequency is reasonably close to the ferromagnetic frequency. We show that, due to the conservation of magnetic moment magnitude, two of the numerically computed full spectrum Lyapunov characteristic exponents are trivially zero. One-parameter bifurcation diagrams are used to investigate various transitions that occur between quasiperiodic, chaotic, and regular regions as the dc-bias current through the junction, I, is varied. We also compute two-dimen

Who reads Chaotic dynamics from coupled magnetic monodomain and Josephson current?

Author

A. E. Botha; Yu. M. Shukrinov; J. Tekić; M. R. Kolahchi

Publisher

American Physical Society (APS)

Published

2023

Language

EN

Field

Physics and Astronomy (Physical Sciences)