Total ionizing dose effects on aluminum oxide/zirconium-doped hafnium oxide stack ferroelectric tunneling junctions

Conclusion In this study, the TID effects on the FTJs with HfO 2 /Al 2 O 3 dielectric bilayer are investigated. The P - V , C - V, I - V , endurance, and read current characteristics are analyzed before and after radiation. The I-V, P-V and endurance characteristics show very little change after the...

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Bibliographic Details
Published in:Science China. Information sciences 2022-06, Vol.65 (6), p.169403, Article 169403
Main Authors: Yang, Xueqin, Xu, Yannan, Bi, Jinshun, Xi, Kai, Fan, Linjie, Ji, Lanlong, Xu, Gaobo
Format: Article
Language:English
Subjects:
Aerospace environments
Aluminum oxide
Bilayers
Computer Science
Electrical junctions
Ferroelectricity
Hafnium oxide
Information Systems and Communication Service
Letter
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Summary:Conclusion In this study, the TID effects on the FTJs with HfO 2 /Al 2 O 3 dielectric bilayer are investigated. The P - V , C - V, I - V , endurance, and read current characteristics are analyzed before and after radiation. The I-V, P-V and endurance characteristics show very little change after the total dose of up to 1 Mrad (Si), which means the ferro-electricity is not affected by the TID. However, owing to the positive fixed charges formed in Al 2 O 3 film and the interface traps accumulation during the radiation, the read current of the programed device is increasing, while the read current of the erased device is reducing after radiation. These findings are useful in understanding the radiation mechanisms of HfO 2 /dielectric bilayer-based FTJs and can promote the application of FTJs in the nuclear and aerospace environments.
ISSN:1674-733X
1869-1919
DOI:10.1007/s11432-021-3269-4