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(a) Layer architecture for tape (A) and corresponding resistive superconducting transition; (b) layer architecture for tape (B) and corresponding superconducting transition. The solid line represents a fit according to the introduced resistor network model.
The simulated resistivity of the Ba-122/Fe bilayer () decreases with increasing Fe layer thickness to Ba-122 layer thickness ratio d (a). As a consequence, the superconducting transition width reduces (b) and the criterion shifts to lower temperatures.
Schematic view of the four probe contact arrangement (a) including the assumed resistor network model. Simulation of the resistance, arising between the voltage, leads for different barrier resistances (b) using Eq. (2) and ensuing solutions and for (c). The arrows indicate the resistive transition combining the two solution branches.
(a) Reconstructed transition of the Ba-122/Fe bilayer from measurement data of tape (B) (Fig. 1(b)) using the resistor network in comparison to a film prepared on a MgO single crystal (MgO-SC). (b) The calculated ratio of the current shunted by the tape depending on the critical current density, determined at V/cm and measured field dependent critical current density of the sample (inset).
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