Injection locking in DC-driven spintronic vortex oscillators via surface acoustic wave modulation
Abstract: Control of the microwave signal generated by spin-transfer torque oscillators (STOs) is crucial for their applications in spin wave generation and neuromorphic computing. This study investigates injection locking of a DC-driven vortex STO using surface acoustic waves (SAWs) to enhance the STO's signal and allow for its synchronization with external inputs. We employ a simplified model based on Thiele's formalism and highlight the role of vortex deformations in achieving injection locking. Micromagnetic simulations are conducted to validate our theoretical predictions, revealing how the locking bandwidth depends on SAW amplitude, as well as on the amplitude and direction of an applied external field. Our findings are pivotal for advancing experimental research and developing efficient low-power synchronization methods for large-scale STO networks.
- R. C. Sousa and I. L. Prejbeanu, Comptes Rendus Physique 6, 1013 (2005).
- R. Tancrell and R. Williamson, Applied Physics Letters 19, 456 (1971).
- M. G. Holland and L. T. Claiborne, Proceedings of the IEEE 62, 582 (1974).
- J. Maines and E. G. Paige, in IEEE Proceedings, Vol. 64 (1976) pp. 639–652.
- K.-y. Hashimoto and K.-Y. Hashimoto, Surface acoustic wave devices in telecommunications, Vol. 116 (Springer, 2000).
- P. Hess, Physics Today 55, 42 (2002).
- K. Y. Guslienko, Journal of nanoscience and nanotechnology 8, 2745 (2008).
- “See,” www.aithericon.com for Aithericon.
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