3D Interconnected Magnetic Nanowire Networks as Potential Integrated Multistate Memristors

Interconnected magnetic nanowire (NW) networks offer a promising platform for three-dimensional (3D) information storage and integrated neuromorphic computing. Here we report discrete propagation of magnetic states in interconnected Co nanowire networks driven by magnetic field and current, manifest...

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Bibliographic Details
Published in:Nano letters Vol. 22; no. 24; pp. 10010 - 10017
Main Authors: Bhattacharya, Dhritiman, Chen, Zhijie, Jensen, Christopher J., Liu, Chen, Burks, Edward C., Gilbert, Dustin A., Zhang, Xixiang, Yin, Gen, Liu, Kai
Format: Journal Article
Language:English
Published: United States American Chemical Society 28.12.2022
Subjects:
multistate memristors
3D information storage
3D nanomagnetism
nanowire networks
ISSN:1530-6984, 1530-6992, 1530-6992
Online Access:Get full text
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Summary:Interconnected magnetic nanowire (NW) networks offer a promising platform for three-dimensional (3D) information storage and integrated neuromorphic computing. Here we report discrete propagation of magnetic states in interconnected Co nanowire networks driven by magnetic field and current, manifested in distinct magnetoresistance (MR) features. In these networks, when only a few interconnected NWs were measured, multiple MR kinks and local minima were observed, including a significant minimum at a positive field during the descending field sweep. Micromagnetic simulations showed that this unusual feature was due to domain wall (DW) pinning at the NW intersections, which was confirmed by off-axis electron holography imaging. In a complex network with many intersections, sequential switching of nanowire sections separated by interconnects was observed, along with stochastic characteristics. The pinning/depinning of the DWs can be further controlled by the driving current density. These results illustrate the promise of such interconnected networks as integrated multistate memristors.
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ISSN:1530-6984
1530-6992
1530-6992
DOI:10.1021/acs.nanolett.2c03616