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Etat critique dans le supraconducteur à haute température YBCO.

The critical state in YBCO high-temperature superconductor.

Auteurs : BRACANOVIC D., GROOT P. A. J. de, OUSSENA M., PORTER S. J., MIRONOV O. A., MANTON S. J., YI Z., BEDUZ C., MCDONALD P. C.

Résumé

A practical method was devised for measurements of the diamagnetic response of high-temperature superconductor specimens. The method is useful for the study of the temperature and field dependencies of the local magnetic induction and its two-dimensional visualisation. Cross-shaped miniature Hall probes of thin film n-indium-antimony on semi-insulating substrate i-gallium-arsenic with a small magnetically sensitive zone of 0.1 x 0.1 mm2 were used as measuring transducers. This method enabled the authors to study anisotropy of the critical current densities of melt-grown YBCO pellets. Also, they have been able to determine local cracks and grain connectivity in the YBCO pellet samples.

Détails

  • Titre original : The critical state in YBCO high-temperature superconductor.
  • Identifiant de la fiche : 1998-2130
  • Langues : Anglais
  • Date d'édition : 10/1997
  • Source : Source : Cryogenics/Proc. LTEC, Southampton
    vol. 37; n. 10; 555-557; 6 fig.; 7 ref.

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