Vacuum and Surface Science
Online ISSN : 2433-5843
Print ISSN : 2433-5835
Special Feature : Transactions of the Annual Meeting on the Japan Society of Vacuum and Surface Science 2018 [III]
Fabrication and Observation of Metastable to Stable Relaxation of Palladium Hydride Thin Films
Takahiro OZAWARyota SHIMIZUShohei OGURATaro HITOSUGIKatsuyuki FUKUTANI
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2019 Volume 62 Issue 8 Pages 492-497

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Abstract

We fabricated metastable palladium hydride by hydrogen ion implantation to a 10 nm-thick Pd film at 7 K, and monitored the hydride formation and relaxation to a stable state by resistivity measurements. By heating the sample, we observed a substantial change in resistivity below 100 K without accompanying hydrogen desorption. While the resistivity change was observed at 80 K for both H and D, it was observed only for H at 6 K. This irreversible resistivity change is attributed to transition from the metastable state to its stable state by hydrogen diffusion. It is considered that hydrogen atoms undergo diffusion thermally at 80 K and by quantum tunneling at 6 K.

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この記事はクリエイティブ・コモンズ [表示 - 非営利 4.0 国際]ライセンスの下に提供されています。
https://creativecommons.org/licenses/by-nc/4.0/deed.ja
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