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Size effect on deuterium behavior in nano-sized vanadium layers
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Physics. Zhejiang Univ, State Key Lab Silicon Mat, Hangzhou 310027, Zhejiang, Peoples R China;Zhejiang Univ, Sch Mat Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China.
Univ Washington, Dept Mat Sci & Engn, Seattle, WA 98195 USA.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Physics. Uppsala Univ, Dept Phys & Astron, SE-75120 Uppsala, Sweden.ORCID iD: 0000-0003-1803-9467
2019 (English)In: SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY, ISSN 1674-7348, Vol. 62, no 11, article id 117011Article in journal (Refereed) Published
Abstract [en]

Size effect on thermodynamics and diffusion of deuterium in nano-sized vanadium (V) layers is studied. Critical temperature (T-c) for deuterium phase transition is found to decrease with the inverse thickness of V layers and the thermodynamic factor increases as V thickness decreases. These effects are related to the deuterium-deuterium (D-D) interaction change versus V thickness, which experimentally proves that the D-D interaction plays the main contribution to the previously observed V size effect on deuterium chemical diffusion coefficients (D-c). The self-diffusion coefficients (D-s) are obtained through correcting D-c with the thermodynamic factors. It is found that the D-s are similar in 14 and 28 monolayers of V while slightly larger D-s are observed at high concentrations in 14 atomic layers. The weak site blocking effect in the interface is argued to be the main contribution to the observed size effect on D-s.

Place, publisher, year, edition, pages
2019. Vol. 62, no 11, article id 117011
Keywords [en]
size effect, D-D interaction, deuterium diffusion, Fe/V superlattice, optical transmission
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:uu:diva-383494DOI: 10.1007/s11433-018-9381-8ISI: 000466398100001OAI: oai:DiVA.org:uu-383494DiVA, id: diva2:1316451
Funder
Swedish Energy AgencySwedish Research CouncilAvailable from: 2019-05-17 Created: 2019-05-17 Last updated: 2019-05-17Bibliographically approved

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Huang, WenHjörvarsson, Björgvin

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