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Correlation Between Oxygen Composition and Electrical Properties in NiO Thin Films for Resistive Random Access Memory

Published online by Cambridge University Press:  01 February 2011

Yusuke Nishi ,
Tatsuya Iwata  and
Tsunenobu Kimoto
Yusuke Nishi
Affiliation:
[email protected], Kyoto University, Kyoto, Japan
Tatsuya Iwata
Affiliation:
[email protected], Kyoto University, Kyoto, Japan
Tsunenobu Kimoto
Affiliation:
[email protected], Kyoto University, Kyoto, Japan
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Abstract

Admittance spectroscopy measurement has been performed on NiOx thin films with various oxygen compositions (x=1.0-1.2) in order to characterize localized defect levels. The activation energy and concentration of localized defect levels in NiOx films with low oxygen composition (x≤1.07) are 120-170 meV and lower than 2×1019 cm-3, respectively. From I-V measurement of the Pt/NiOx/Pt structures, samples with high oxygen composition (x≥1.10) did not show resistance switching operation, while samples with low oxygen composition (x≤1.07) did. The best oxygen composition of NiOx thin films turned out to be 1.07 in order to realize repeatable and stable resistance switching operation.

Keywords

memoryoxidesputtering
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1250: Symposium G – Materials and Physics for Nonvolatile Memories II , 2010 , 1250-G05-05
Copyright
Copyright © Materials Research Society 2010

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