Spike-timing-dependent-plasticity learning in a planar magnetic domain wall artificial synapsis
Journal:
arXiv
Published Date:
Sep 12, 2024
Abstract
Future neuromorphic architectures will require millions of artificial
synapses, making understanding the physical mechanisms behind their plasticity
functionalities mandatory. In this work, we propose a simplified spin
memristor, where the resistance can be controlled by magnetic field pulses,
based on a Co/Pt multilayer with perpendicular magnetic anisotropy as a
synapsis emulator. We demonstrate plasticity and spike time dependence
plasticity (STDP) in this device and explored the underlying magnetic
mechanisms using Kerr microscopy imaging and Hall magneto-transport
measurements. A well-defined threshold for magnetization reversal and the
continuous resistance states associated with the micromagnetic configuration
are the basic properties allowing plasticity and STDP learning mechanisms in
this device.
