Colossal resistance switching effect in Pt/ spinel -MgZnO/Pt devices for nonvolatile memory applications

We reported the discovery of colossal resistance switching effect in polycrystalline spinel-like structure MgZnO thin films with high Mg contents sandwiched by Pt electrodes. The ultrahigh resistance ratio of high resistance state to low resistance state of about seven to nine orders of magnitude wi...

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Bibliographic Details
Published in:Applied physics letters 2009-01, Vol.94 (3)
Main Authors: Chen, Xinman, Wu, Guangheng, Jiang, Peng, Liu, Weifang, Bao, Dinghua
Format: Article
Language:English
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Summary:We reported the discovery of colossal resistance switching effect in polycrystalline spinel-like structure MgZnO thin films with high Mg contents sandwiched by Pt electrodes. The ultrahigh resistance ratio of high resistance state to low resistance state of about seven to nine orders of magnitude with a low reset voltage of less than 1 V was obtained in this thin film system. The resistance ratio shows an increase of several orders of magnitude compared with those of previously reported resistance switching material systems including metal oxides, semiconductors, and organic molecules. This colossal resistance switching effect will greatly improve the signal-to-noise ratio and simplify the process of reading memory state for nonvolatile memory applications. Our study also provides a material base for studying the origin of resistance switching phenomenon.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3073858