Title

Critical current density performance of malic acid doped magnesium diboride wires at different operating temperatures

RIS ID

31464

Publication Details

Xu, X., Kim, J., Zhang, Y., Jercinovic, M. & Babic, E. (2009). Critical current denisty performance of malic acid doped magnesium diboride wires at different operating temperatures. International Journal of Modern Physics B, 23 (17), 3497-3502.

Abstract

We investigated the effects of different operating temperatures on the performance of transport critical current density, Jc, for MgB2 + 10 wt%C4H6O5MgB2/Fe wires. It was shown that the Jc values of the malic acid doped wires sintered at 900°C reached 104 Acm-2 at 20 K and 5 T. The Jc value extrapolated to 2 T and 20 K exceeds the practical level of 105 Acm-2. According to the Kramer plots, the pinning force, FK = Jc1/2 x B1/4, is expected to be a linear function of magnetic field B. The irreversibility field, Birr, at which extrapolated FK reaches zero, was 1.8 T at 32.8 K, 2.8 T at 30 K, 5.7 T at 25 K, 8.6 T at 20 K, and 12.5 T at 15 K, respectively.

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Link to publisher version (DOI)

http://dx.doi.org/10.1142/S0217979209062864