Home

Formerly "European Superconductivity News Forum (ESNF)"
Joint publication of the IEEE Council on Superconductivity (CSC) and
the European Society for Applied Superconductivity (ESAS), with a cooperation of Editors from Asia, Australia, and New Zealand

    You are here

    • You are here:
    • Home > Materials Science Challenges for High Temperature Superconducting Wire

Materials Science Challenges for High Temperature Superconducting Wire

Regularly Updated Latest News, Quarterly
Published Papers, Preprints & Presentations

Materials Science Challenges for High Temperature Superconducting Wire

Oct. 30, 2007 (H10).  In a recent review published in Nature Materials, S.R. Foltyn et al. discuss the materials science challenges for high-Tc superconducting wire.  Thousands of kilometers of high-temperature superconducting wire have now been manufactured for demonstrations of transmission cables, motors, and other electrical power components. The remaining task for materials scientists is to return to the fundamentals and squeeze as much performance as possible from these wonderful and technologically difficult rare-earth (RE) barium cuprate materials, REBa2Cu3O7-δ suitable for use as films on metallic substrates (the coated conductors, CC).  The key to success is understanding and improving flux pinning.  Much success has been achieved in the last 3 years, but there is still a lot of work to do.  Concerted studies of the interrelationships between processing, film defects, and flux pinning are now required, because crossing the threshold of commercial viability may depend upon the kind of performance improvements that can be achieved through a better understanding of these relationships. This article reviews and critically compares the huge amount of recent work on the various methods to improve both self-field critical current density, Jc, and in-field Jc at 65-77K.  It also establishes a methodology for judging the improvement of existing and future efforts in the area.  Figure 1 shows the potentially useful flux pinning defects found in a typical REBa2Cu3O7-δ film or CC.

[1] S. R. Foltyn, L.Civale, J. L. MacManus-Driscoll, Q.X. Jia, B. Maiorov, H. Wang and M. Maley, 
     Nature Materials6(9), 631-642 (2007)

Potentially Useful Flux Pinning Defects

Fig. 1 Potentially Useful Flux Pinning Defects Found in a Typical Rare Earth Barium Cuprate Film or Coated Conductor.

(Highlight by J. L. MacManus-Driscoll)

The SNF had 1,528 visitors in the month of September 2017,
and has had 144,167 visitors 
since its inception on July 15, 2007.