Shape?Dependent Multi?Weight Magnetic Artificial Synapses for Neuromorphic Computing
نویسندگان
چکیده
In neuromorphic computing, artificial synapses provide a multi-weight (MW) conductance state that is set based on inputs from neurons, analogous to the brain. Herein, magnetic materials use tunnel junction (MTJ) and domain wall (DW) are explored. By fabricating lithographic notches in DW track underneath single MTJ, 3–5 stable resistance states can be repeatably controlled electrically using spin-orbit torque achieved. The effect of geometry synapse behavior explored, showing trapezoidal device has asymmetric weight updates with high controllability, while rectangular higher stochasticity, but levels. data input into computing simulators show usefulness application-specific synaptic functions. Implementing an neural network (NN) applied streamed Fashion-MNIST data, used as metaplastic function for efficient online learning. convolutional NN CIFAR-100 image recognition, achieves near-ideal inference accuracy, due stability its This work shows MW feasible technology provides design guidelines emerging technologies.
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ژورنال
عنوان ژورنال: Advanced electronic materials
سال: 2022
ISSN: ['2199-160X']
DOI: https://doi.org/10.1002/aelm.202200563