Share

CRITICAL CURRENTS IN POLYCRYSTALLINE YBCO.

Author(s) : FINLAYSON T. R.

Type of article: Article

Summary

THE CRITICAL DENSITY FOR A POLYCRYSTALLINE SAMPLE IS CALCULATED ASSUMING A MODEL OF WEAKLY COUPLED SUPERCONDUCTING GRAINS AND THE INFLUENCE OF GRAIN SIZE ON THE MAXIMUM TUNNELLING CURRENT IS INVESTIGATED. IN ADDITION THE JOSEPHSON VORTICES ARE SHOWN TO BE BOUND BY THE PINNING FORCE INHERENT TO THE MAGNETIC BEHAVIOUR OF THE WEAK LINK BETWEEN GRAINS. THE INTERGRAIN CRITICAL CURRENT DENSITY IS DERIVED AS A FUNCTION OF FIELD AND TEMPERATURE AND THE RESULTS OF THE CALCULATIONS ARE ILLUSTRATED WITH REFERENCE TO EXPERIMENTAL DATA FROM ALTERNATING CURRENT SUSCEPTIBILITY AND LOW FIELD MAGNETIZATION MEASUREMENTS.

Details

  • Original title: CRITICAL CURRENTS IN POLYCRYSTALLINE YBCO.
  • Record ID : 1991-1983
  • Languages: English
  • Source: Cryogenics - vol. 30 - n. 5
  • Publication date: 1990

Links


See other articles in this issue (13)
See the source

Indexing