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. 2018 Mar 16;8:4710. doi: 10.1038/s41598-018-22983-6

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© The Author(s) 2018

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Normalised temperature dependence of the critical current density. Plotted curves refer to four films covering the whole range of thicknesses of the considered Nb nanofilms. Lines are the least-squares fit by the Ginzburg-Landau relation (see the equation S1 in the supplementary material) to the experimental data points.