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Ultra-fast logic devices using artificial "neurons" based on antiferromagnetic pulse generators

Journal article
Authors O. Sulymenko
O. Prokopenko
I. Lisenkov
Johan Åkerman
V. Tyberkevych
A. N. Slavin
Roman Khymyn
Published in Journal of Applied Physics
Volume 124
Issue 15
ISSN 0021-8979
Publication year 2018
Published at Department of Physics (GU)
Language en
Links dx.doi.org/10.1063/1.5042348
Keywords spin-polarized current, ferromagnetic-films, driven, spintronics, torque, waves
Subject categories Condensed Matter Physics

Abstract

It has been shown previously that spin-Hall oscillators based on current-driven bi-layered film structures containing an antiferromagnet (AFM) and a normal metal can generate ultra-short (similar to 2 ps) "spike-like" pulses in response to an external current stimulus of a sufficient amplitude, thus operating as ultra-fast artificial "neurons." Here, we report the results of numerical simulations demonstrating that a single AFM "neuron" can perform the logic functions of OR, AND, MAJORITY, or Q-gates, while a circuit consisting of a small number n < 5 of AFM "neurons" can function as a FULL-ADDER or as a dynamic memory loop with variable clock frequency. The clock frequencies of such AFM-based logic devices could reach tens of GHz, which make them promising as base elements of future ultra-fast high-efficiency neuromorphic computing. Published by AIP Publishing.

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