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Figure 1 | Journal of Analytical Science and Technology

Figure 1

From: Carbon doping induced imperfections on MgB2 superconducting wire

Figure 1

The critical current density and upper critical field of MgB2 wire. (a) Field dependence of the critical current density for the malic acid-doped sample at various temperatures. (b) Temperature dependence of the upper critical field extracted from the percolation model analysis. In (a), solid symbols are experimental data from the standard four-probe method using the electric field criterion of 1 μV/cm. Lines are calculated by the percolation model. In (b), lines are calculated by the two-band dirty-limit theory.

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