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...

Full description

Saved in:
Bibliographic Details
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
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:0021-8979
1089-7550
DOI:10.1063/5.0225582