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Rectifying Polarity Switch of Pt/TiO2-x/Pt

Published online by Cambridge University Press:  31 January 2011

Ni Zhong ,
Hisashi Shima  and
Hiro Akinaga
Ni Zhong
Affiliation:
[email protected], National Institute of Advanced Industrial Science, 1-1-1central 2, Umezono, Tsukuba, Ibaraki, 305-8568, Japan
Hisashi Shima
Affiliation:
[email protected], National Institute of Advanced Industrial Science, Tsukuba, Japan
Hiro Akinaga
Affiliation:
[email protected], National Institute of Advanced Industrial Science, Tsukuba, Japan
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Abstract

Current-voltage (I-V) characteristic of Pt/TiO2-x/Pt has been investigated. The Pt/TiO2-x/Pt devices in the initial state exhibit a rectifying I-V behavior. By applying a pulse voltage, the rectifying polarity could be switched to an opposite direction. The mechanism of the rectifying polarity switch is proposed as the local drift of defects, such as oxygen vacancies (VO), due to applying pulse voltage. It is found that the required pulse voltage height for the polarity switch (Vswitch) exhibits much dependence on the operation temperature and width of applied pulse voltage. With an increase of the pulse voltage width or the measurement temperature (T), Vswitch exhibits a decrease with increase of T. These results suggest that the rectifying polarity switch in the Pt/TiO2-x/Pt is attributed to a thermal and dynamic dependence process, which agree well with the localized migration of VO induced by applied pulse voltage.

Keywords

defectsthin filmPt
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1174: Symposium V – Functional Metal-Oxide Nanostructures , 2009 , 1174-V06-07
Copyright
Copyright © Materials Research Society 2009

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