Journal
RESULTS IN PHYSICS
Volume 27, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.rinp.2021.104475
Keywords
Superparamagnetic tunnel junctions; Spintronic stochastic neurons; Subthreshold synchronization; Levy noise
Funding
- Basic Research Grant (Hybrid AI) of Institute for AI and Beyond for the University of Tokyo
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The study found that levy noise can impact the subthreshold synchronization of SMTJs, with weak pulse characteristics promoting synchronization and enhanced pulse characteristics not. Additionally, enhanced levy noise asymmetry is advantageous for achieving SMTJ synchronization under subthreshold driving.
Superparamagnetic tunnel junctions (SMTJs) are spintronic nanodevices that can oscillate spontaneously under the influence of thermal noise. Studies have proposed that SMTJs can be modeled as magnetic neurons by subjecting them to electrical Gaussian white noise and can be subsequently synchronized under subthreshold driving. Considering the non-Gaussian background noise in industrial applications, this study investigated the influence of levy noise on SMTJ subthreshold synchronization. The results revealed that levy noise with weak pulse characteristics can be used to promote the subthreshold synchronization of the SMTJs, whereas levy noise with enhanced pulse characteristics cannot be used. Under the same conditions, enhanced levy noise asymmetry is advantageous for achieving SMTJ synchronization under subthreshold driving.
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