We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Domain wall magnetic tunnel junction-based artificial synapses and neurons for all-spin neuromorphic hardware.
- Authors
Liu, Long; Wang, Di; Wang, Dandan; Sun, Yan; Lin, Huai; Gong, Xiliang; Zhang, Yifan; Tang, Ruifeng; Mai, Zhihong; Hou, Zhipeng; Yang, Yumeng; Li, Peng; Wang, Lan; Luo, Qing; Li, Ling; Xing, Guozhong; Liu, Ming
- Abstract
We report a breakthrough in the hardware implementation of energy-efficient all-spin synapse and neuron devices for highly scalable integrated neuromorphic circuits. Our work demonstrates the successful execution of all-spin synapse and activation function generator using domain wall-magnetic tunnel junctions. By harnessing the synergistic effects of spin-orbit torque and interfacial Dzyaloshinskii-Moriya interaction in selectively etched spin-orbit coupling layers, we achieve a programmable multi-state synaptic device with high reliability. Our first-principles calculations confirm that the reduced atomic distance between 5d and 3d atoms enhances Dzyaloshinskii-Moriya interaction, leading to stable domain wall pinning. Our experimental results, supported by visualizing energy landscapes and theoretical simulations, validate the proposed mechanism. Furthermore, we demonstrate a spin-neuron with a sigmoidal activation function, enabling high operation frequency up to 20 MHz and low energy consumption of 508 fJ/operation. A neuron circuit design with a compact sigmoidal cell area and low power consumption is also presented, along with corroborated experimental implementation. Our findings highlight the great potential of domain wall-magnetic tunnel junctions in the development of all-spin neuromorphic computing hardware, offering exciting possibilities for energy-efficient and scalable neural network architectures. The authors demonstrate all-spin synapses and neurons using domain wall-magnetic tunnel junctions, utilizing synergistic spin-orbit torque and Dzyaloshinskii-Moriya interaction. The intrinsic linearity is required for compact and energy-efficient bio-inspired hardware for neuromorphic computing.
- Subjects
MAGNETIC domain walls; MAGNETIC tunnelling; SYNAPSES; NEURONS; SPIN-orbit interactions
- Publication
Nature Communications, 2024, Vol 15, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-024-48631-4