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Field dependence of the critical current density of MgB2 conductors between 4.2 K and 30 K up to 20 T

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6 Author(s)
Arda, L. ; Nat. High Magnetic Field Lab., Tallahassee, FL, USA ; Ozdemir, M. ; Akin, Y. ; Aktas, S.
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The critical current density (Jc) of the monofilament Monel/Fe/MgB2 wire was measured between 4.2 K and 30 K with a Variable Temperature Insert (VTI) in a 20 T superconducting magnet using the analog DC pulse four-wire method with 1 μv/cm criterion. The critical current density, Jc was measured to be 0.16×105 A/cm2 at 4 T at 21 K for a MgB2 sample which was annealed at 700°C for 5 min and at 900°C for 5 min under Ar gas flow. Scanning Electron Microscopy (SEM) and X-ray diffraction (XRD) analysis were used to characterize the microstructure of the samples.

Published in:

Applied Superconductivity, IEEE Transactions on  (Volume:15 ,  Issue: 2 )