Weak links and phase slip centers in superconducting MgB2 wires

Maya Bar-Sadan, Gregory Leitus, Shimon Reich

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

MgB2 superconducting wires were produced by the Mg diffusion method. Scanning electron microscopy (SEM), optical microscopy, dispersive X-ray analysis (EDS), and XRD diffraction were used to study the physical structure and content of the wires. Magnetic properties (Tcm, H c1, Hc2, Jc by the Bean model) were obtained with a SQUID magnetometer, and transport properties (Tc, H c2, resistivity and residual resistivity ratio) were measured using a standard four-lead configuration. The V-I characteristics of the wires close to the critical temperature showed a staircase response, which was attributed to the presence of weak links, creating phase slip centers. The origin of those weak links is discussed in relation to their formation and structure.

Original languageEnglish
Pages (from-to)497-502
Number of pages6
JournalJournal of Superconductivity and Novel Magnetism
Volume17
Issue number4
DOIs
StatePublished - 1 Jan 2004
Externally publishedYes

Keywords

  • MgB
  • Superconducting wires
  • Weak links

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