2018/02/27 by Roman Khymyn, Khymyn, Roman, Ivan Lisenkov +13 · 2 citations
Computer Science · Physics and Astronomy · #Chaos control and synchronization #FOS: Physical sciences #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Neural Networks and Reservoir Computing #Nonlinear Dynamics and Pattern Formation
paper · pdf · doi:10.48550/arxiv.1802.10236
openalex publication_date 2018/02/27 · openalex created_date 2022/10/06 · openalex updated_date 2026/07/28
We demonstrate analytically and numerically, that a thin film of an\nantiferromagnetic (AFM) material, having biaxial magnetic anisotropy and being\ndriven by an external spin-transfer torque signal, can be used for the\ngeneration of ultra-short "Dirac-delta-like" spikes. The duration of the\ngenerated spikes is several picoseconds for typical AFM materials and is\ndetermined by the in-plane magnetic anisotropy and the effective damping of the\nAFM material. The generated output signal can consist of a single spike or a\ndiscrete group of spikes ("bursting"), which depends on the repetition (clock)\nrate, amplitude, and shape of the external control signal. The spike generation\noccurs only when the amplitude of the control signal exceeds a certain\nthreshold, similar to the action of a biological neuron in response to an\nexternal stimulus. The "threshold" behavior of the proposed AFM spike generator\nmakes possible its application not only in the traditional microwave signal\nprocessing but also in the future neuromorphic signal processing circuits\nworking at clock frequencies of tens of gigahertz.\n