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Dispersion des nanoparticules pour améliorer la force d'ancrage du flux du supraconducteur YBa2Cu3O7-x.

Addition of nanoparticle dispersions to enhance flux pinning of the YBa2Cu3O7-x superconductor.

Auteurs : HAUGAN T., BARNES P. N., WHEELER R., et al.

Type d'article : Article

Résumé

Following the discovery of type-II high-temperature superconductors in 1986, work has proceeded to develop these materials for power applications. One of the problems, however, has been that magnetic flux is not completely expelled, but rather is contained within magnetic fluxons, whose motion prevents larger supercurrents. It is known that the critical current of these materials can be enhanced by incorporating a high density of extended defects to act as pinning centres for the fluxons. YBa2Cu3O7 (YBCO or 123) is the most promising material for such applications at higher temperatures (liquid nitrogen). This article reports a method for achieving a dispersion of 8-nm-sized nanoparticles in YBCO with a high number density, which increases the critical current (at 77 K) by a factor of two to three for high magnetic fields.

Détails

  • Titre original : Addition of nanoparticle dispersions to enhance flux pinning of the YBa2Cu3O7-x superconductor.
  • Identifiant de la fiche : 2005-0008
  • Langues : Anglais
  • Source : Nature - vol. 430 - n. 7002
  • Date d'édition : 19/08/2004

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