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Title: Synaptic element for neuromorphic computing using a magnetic domain wall device with synthetic pinning sites
Authors: Jin, Tianli
Gan, Weiliang
Tan, Funan
Sernicola, Nicolo Roberto
Lew, Wen Siang
Piramanayagam, S. N.
Keywords: Science::Physics
Issue Date: 2019
Source: Jin, T., Gan, W., Tan, F., Sernicola, N. R., Lew, W. S., & Piramanayagam, S. N. (2019). Synaptic element for neuromorphic computing using a magnetic domain wall device with synthetic pinning sites. Journal of Physics D: Applied Physics, 52(44), 445001-. doi:10.1088/1361-6463/ab35b7
Journal: Journal of Physics D: Applied Physics
Abstract: The ability to make devices that mimic the human brain has been a subject of great interest in scientific research in recent years. Current artificial intelligence algorithms are primarily executed on the von Neumann hardware. This causes a bottleneck in processing speeds and is not energy efficient. In this work, we have demonstrated a synaptic element based on a magnetic domain wall device. The domain wall motion was controlled with the use of synthetic pinning sites, which were introduced by boron (B+) ion-implantation for local modification of the magnetic properties. The magnetization switching process of a Co/Pd multilayer structure with perpendicular magnetic anisotropy was observed by using MagVision Kerr microscopy system. The B+ implantation depth was controlled by varying the thickness of a Ta overcoat layer. The Kerr microscopy results correlate with the electrical measurements of the wire which show multiple resistive states. The control of the domain wall motion with the synthetic pinning sites is demonstrated to be a reliable technique for neuromorphic applications.
ISSN: 0022-3727
DOI: 10.1088/1361-6463/ab35b7
Rights: © 2019 IOP Publishing Ltd. All rights reserved. This is an author-created, un-copyedited version of an article accepted for publication in Journal of Physics D: Applied Physics. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The definitive publisher authenticated version is available online at
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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