Spintronic Neuron Using a Magnetic Tunnel Junction for Low-Power Neuromorphic Computing

TL;DR

This paper introduces a low-power, fast-operating spintronic neuron based on SV/MTJ technology, capable of mimicking biological neural behaviors for scalable neuromorphic computing.

Contribution

It presents a novel SV/MTJ-based neuron model with analytical dynamics and demonstrates its potential for low-power, high-speed neuromorphic applications.

Findings

Operates at ~1 ns timescale

Consumes as low as 50 μW power

Replicates key neural behaviors

Abstract

This paper proposes a novel spiking artificial neuron design based on a combined spin valve/magnetic tunnel junction (SV/MTJ). Traditional hardware used in artificial intelligence and machine learning faces significant challenges related to high power consumption and scalability. To address these challenges, spintronic neurons, which can mimic biologically inspired neural behaviors, offer a promising solution. We present a model of an SV/MTJ-based neuron which uses technologies that have been successfully integrated with CMOS in commercially available applications. The operational dynamics of the neuron are derived analytically through the Landau-Lifshitz-Gilbert-Slonczewski (LLGS) equation, demonstrating its ability to replicate key spiking characteristics of biological neurons, such as response latency and refractive behavior. Simulation results indicate that the proposed neuron design can operate on a timescale of about 1 ns, without any bias current, and with power consumption as low as 50 uW.