The Impact of ⁶⁰Co γ -Ray Irradiation on the Linearity of Conductance Update and the Learning Precision of Al:HfOx/TiOx Heterojunction Memristive Synapses

IF 1.9 3区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Nuclear Science Pub Date : 2025-02-06 DOI:10.1109/TNS.2025.3539301

Chuan Ma;Jiaqi Yan;Hongjia Song;Binghan Wu;Jiayue Guo;Xiangli Zhong;Jinbin Wang;Hongxia Guo

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引用次数: 0

Abstract

Good linearity and radiation resistance of conductance updates in memristive synapses are crucial for their use in neuromorphic computing chips in space. Here, the Au/Al:HfOx/TiOx/Ti memristive synapses with good linearity are prepared. The effects of irradiation on the memristive performances are studied through 60Co

$\gamma $

-ray irradiation experiments. The effect of irradiation on the image recognition accuracy of the neural network based on the memristive synapse crossbar array is predicted. The results show that the devices maintained good conductance update linearity under irradiation. When the 60Co

$\gamma $

-ray irradiation reaches 1 Mrad(Si), the nonlinearity (NL) of conductance update only increases from 0.096 to 0.163, and the image recognition accuracy of the memristor neural network decreases by about 2% (from 91% to 89%). The initial value of oxygen defect content in HfOx resistive materials after Al doping modification is relatively high (36%), which can explain why irradiation has little effect on conductance update linearity and recognition accuracy. These results suggest that the Au/Al:HfOx/TiOx/Ti memristors show good radiation resistance under 60Co

$\gamma $

-ray irradiation, which makes them promising candidates for artificial synapses in space applications.

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来源期刊

IEEE Transactions on Nuclear Science 工程技术-工程：电子与电气

CiteScore

3.70

自引率

27.80%

发文量

314

审稿时长

6.2 months

期刊介绍： The IEEE Transactions on Nuclear Science is a publication of the IEEE Nuclear and Plasma Sciences Society. It is viewed as the primary source of technical information in many of the areas it covers. As judged by JCR impact factor, TNS consistently ranks in the top five journals in the category of Nuclear Science & Technology. It has one of the higher immediacy indices, indicating that the information it publishes is viewed as timely, and has a relatively long citation half-life, indicating that the published information also is viewed as valuable for a number of years. The IEEE Transactions on Nuclear Science is published bimonthly. Its scope includes all aspects of the theory and application of nuclear science and engineering. It focuses on instrumentation for the detection and measurement of ionizing radiation; particle accelerators and their controls; nuclear medicine and its application; effects of radiation on materials, components, and systems; reactor instrumentation and controls; and measurement of radiation in space.