Fig. 4 | Scientific Reports

Fig. 4

From: Depth-resolved characterization of Meissner screening breakdown in surface treated niobium

Fig. 4

(a) Normalized surface field enhancement factor \(\mathscr{N}\) and normalized screening length \(\Lambda _{N}\) for the two samples and for each analysis case (Case A, without vortex, and Case B, with vortex, as described in the text) as a function of the applied field. (b) Expected screening profile from the Meissner (\(B_{\text{M}}\)), vortex (\(B_{\text{v}}\)), and total (\(B_{\text{Tot}}\)) contributions for \(B_{\text{a}} < B_{\text{entry}}\) (Meissner state) and for \(B_{a} > B_{\text{entry}}\) with \(B_{\text{in}} < B_{\text{a}}\) in a mixed state with uniform vortex density.

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