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. 2018 Mar 2;9:901. doi: 10.1038/s41467-018-03267-z

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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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Fig. 3 — Magnetometry at 1.6 K. a M(H) loop for our vanadium single-crystal with $H ∥ [111]$ . b Critical current density j_c calculated from the width ΔM of the magnetisation loop. j_c(B) decreases monotonically except for a small peak, labelled B_pp, observed just before the sharp downturn where thermal fluctuations start depinning vortices. The dashed line is a fit to an algebraic decay j_c ∝ B^α. Fitted value of α = −1.7. Inset is a magnification of the region around B_pp