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Structure and electrical properties of Nb-Ge-C nanocomposite coatings
Linköping University, Sweden.
Uppsala University, Sweden.
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Elektronik, EMC.ORCID iD: 0000-0002-3038-4039
Linköping University, Sweden; Impact Coatings AB, Sweden.
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2014 (English)In: Journal of Vacuum Science & Technology. A. Vacuum, Surfaces, and Films, ISSN 0734-2101, E-ISSN 1520-8559, Vol. 32, no 4, article id 041509Article in journal (Refereed) Published
Abstract [en]

Nb-Ge-C nanocomposite thin films were deposited by dc magnetron sputtering using three elemental targets. The films consist of substoichiometric NbC x in a nanometer-thick matrix of amorphous C and Ge. Films with no Ge contain grains that are elongated in the growth direction with a (111) preferred crystallographic orientation. With the addition of ∼12 at. % Ge, the grains are more equiaxed and exhibit a more random orientation. At even higher Ge contents, the structure also becomes denser. The porous structure of the low Ge content films result in O uptake from the ambient. With higher C content in the films both the amount of amorphous C and C/Nb-ratio increases. The contact resistance was measured by four-point technique as a function of contact force between 0 and 10 N. The lowest contact resistance (1.7 mΩ) is obtained at 10 N. The resistivity varies between 470 and 1700 μΩ·cm depending on porosity and O content. 

Place, publisher, year, edition, pages
2014. Vol. 32, no 4, article id 041509
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Natural Sciences
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URN: urn:nbn:se:ri:diva-6673DOI: 10.1116/1.4882856Scopus ID: 2-s2.0-84902456529Local ID: 23651OAI: oai:DiVA.org:ri-6673DiVA, id: diva2:964513
Available from: 2016-09-08 Created: 2016-09-08 Last updated: 2025-09-23Bibliographically approved

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