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


Arda L., Ozdemir M., Akin Y., Aktas S., Tomsic M., Hascicek Y.

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, vol.15, no.2, pp.3281-3283, 2005 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 15 Issue: 2
  • Publication Date: 2005
  • Doi Number: 10.1109/tasc.2005.848852
  • Title of Journal : IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
  • Page Numbers: pp.3281-3283

Abstract

The critical current density (J(c)) 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 mu v/cm criterion. The critical current density, J(c) was measured to be 0.16 x 10(5) A/cm(2) at 4 T at 21 K for a MgB2 sample which was annealed at 700 degrees C for 5 min and at 900 degrees 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.