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Robust synchronization of spin-torque oscillators with an LCR load
1Department of Physics and Astronomy, Potsdam University, Karl-Liebknecht-Str 24, D-14476, Potsdam, Germany and NEXT, Laboratoire de Physique Théorique du CNRS, IRSAMC, Université Toulouse, UPS, 31062 Toulouse, France.
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|October 16, 2013
Summary
We investigated spin-torque oscillators with an LCR load. Complete synchronization is stable, but partial synchronization and clustering often occur, leading to complex dynamics.
Area of Science:
- Physics
- Electrical Engineering
- Materials Science
Background:
- Spin-torque oscillators (STOs) are crucial for magnetic memory and logic devices.
- Understanding synchronization dynamics in coupled STOs is key to device performance.
Purpose of the Study:
- To analyze the synchronization behavior of a serial array of STOs with a parallel LCR load.
- To identify conditions favoring complete synchronization versus clustering.
Main Methods:
- Numerical simulations of coupled STO dynamics.
- Analysis of system parameters and initial conditions.
- Investigation of mean-field dynamics and synchronization states.
Main Results:
- The fully synchronous regime is stable across a wide parameter range.
- Complete synchronization does not always emerge from random initial states.
- Nontrivial clustering and partial synchronization are frequently observed, leading to quasiperiodic or chaotic mean-field dynamics.
Conclusions:
- The stability of complete synchronization in STO arrays is confirmed.
- Complex dynamics, including clustering and partial synchronization, are inherent to these systems.
- Control over synchronization states is crucial for designing reliable STO-based devices.
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