Changes in the temperature dependence of Ag/Ta2O5/Pt gapless-type atomic switches caused by desorption/adsorption of water molecules from/into the Ta2O5matrix

Maiko Mikami*, Naoya Tanahashi, Tohru Tsuruoka, Tsuyoshi Hasegawa

*この研究の対応する著者

研究成果: Article査読

抄録

We measured, in vacuum, the temperature dependence of the Forming time in a Ag/Ta2O5/Pt gapless-type atomic switch, the results of which clearly suggest that the rate limiting process is the diffusion of Ag+ cations in the Ta2O5 layer. It is known that water molecules adsorbed in a Ta2O5 matrix enhance the diffusion of Ag+ cations, and this study further shows that desorbing water molecules by annealing at 623 K, which is known to be the desorption temperature of water molecules from Ta2O5 matrixes, increases the diffusion barrier height from 0.38 to 1.1 eV. We found that annealing at much lower temperatures, e.g. 343 K, for a longer period of time can also desorb the said water molecules. Accordingly, we measured the Forming time in air, which resulted in a completely different temperature dependence. The rate limiting process of Forming changes from ionic diffusion to nucleation when the process is conducted in air.

本文言語English
論文番号SCCF05
ジャーナルJapanese journal of applied physics
60
SC
DOI
出版ステータスPublished - 2021 6

ASJC Scopus subject areas

  • 工学(全般)
  • 物理学および天文学(全般)

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「Changes in the temperature dependence of Ag/Ta<sub>2</sub>O<sub>5</sub>/Pt gapless-type atomic switches caused by desorption/adsorption of water molecules from/into the Ta<sub>2</sub>O<sub>5</sub>matrix」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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