Injection locking in DC-driven spintronic vortex oscillators via surface acoustic wave modulation

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 sign...

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Published in:Journal of applied physics 2024-11, Vol.136 (18)
Main Authors: Moukhader, R., Rodrigues, D. R., Riveros, A., Koujok, A., Finocchio, G., Pirro, P., Hamadeh, A.
Format: Article
Language:English
Subjects:
Amplitudes
Frequency locking
Magnons
Oscillators
Signal generation
Surface acoustic waves
Synchronism
Vortices
Wave generation
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container_issue 18
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container_title Journal of applied physics
container_volume 136
creator Moukhader, R.
Rodrigues, D. R.
Riveros, A.
Koujok, A.
Finocchio, G.
Pirro, P.
Hamadeh, A.
description 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.
doi_str_mv 10.1063/5.0225582
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source American Institute of Physics:Jisc Collections:Transitional Journals Agreement 2021-23 (Reading list)
subjects Amplitudes
Frequency locking
Magnons
Oscillators
Signal generation
Surface acoustic waves
Synchronism
Vortices
Wave generation
title Injection locking in DC-driven spintronic vortex oscillators via surface acoustic wave modulation
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