| Title: |
Diverse dynamics in interacting vortices systems through tunable conservative and non-conservative coupling strengths. |
| Authors: |
Hamadeh, Alexandre Abbass, Koujok, Abbas, Rodrigues, Davi R., Riveros, Alejandro, Lomakin, Vitaliy, Finocchio, Giovanni, De Loubens, Grégoire, Klein, Olivier, Pirro, Philipp |
| Source: |
Communications Physics; 3/1/2025, Vol. 8 Issue 1, p1-12, 12p |
| Subject Terms: |
SPIN valves, SPIN waves, MAGNETIC cores, DATA warehousing, MAGNETIC fields, SPHEROMAKS |
| Abstract: |
Magnetic vortices are highly tunable, nonlinear systems with ideal properties for being applied in spin wave emission, data storage, and neuromorphic computing. However, their technological application is impaired by a limited understanding of non-conservative forces, that results in the open challenge of attaining precise control over vortex dynamics in coupled vortex systems. Here, we present an analytical model for the gyrotropic dynamics of coupled magnetic vortices within nano-pillar structures, revealing how conservative and non-conservative forces dictate their complex behavior. Validated by micromagnetic simulations, our model accurately predicts dynamic states, controllable through external current and magnetic field adjustments. The experimental verification in a fabricated nano-pillar device aligns with our predictions, and it showcases the system's adaptability in dynamical coupling. The unique dynamical states, combined with the system's tunability and inherent memory, make it an exemplary foundation for reservoir computing. This positions our discovery at the forefront of utilizing magnetic vortex dynamics for innovative computing solutions, marking a leap towards efficient data processing technologies. This work presents a comprehensive study of the dynamics of coupled magnetic vortex cores in a multilayer spin valve structure. It is shown that tuning the conservative and non-conservative forces by modulating the applied dc current and magnetic field leads to previously unconsidered complex orbits of the vortex cores and a possible application in reservoir computing is proposed. [ABSTRACT FROM AUTHOR] |
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| Database: |
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