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

Autori
Xu, X. ; Kim, J. H. ; Zhang, Y. ; Jerčinović, Marko ; Babić, Emil

Izvornik
International Journal of Modern Physics B (0217-9792) 23 (2009), 17; 3497-3502

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Carbohydrate; Critical current density; Irreversibility field; Kramer plot; Malic acid; MgB2

Sažetak
We investigated the effects of different operating temperatures on the performance of transport critical current density, Jc, for MgB2 + 10 wt% C4H6O5 MgB2/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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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