The giant short-time decay of persistent currents in Y1Ba2Cu3O7-δ at 77K

L. Gao, Y. Y. Xue, P. H. Hor, C. W. Chu

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33 Citations (Scopus)

Abstract

Using a home-made pulse magnetometer, the decay of the persistent supercurrent in Y1Ba2Cu3O7-δ (Y1:2:3) has been measured from 10-4 to 105 s. There is a three-fold nonlogarithmic decrease in the persistent current from 10-4 to 10 s at 77 K, suggesting that the traditionally measured critical current density (Jc) is only a small remnant of the fast reduced supercurrent. The nonlogarithmic decay suggests a significant negative curvature in the corresponding In V-ln I plot and fits with the collective pinning/superconductive glass model qualitatively.

Original languageEnglish
Pages (from-to)438-444
Number of pages7
JournalPhysica C: Superconductivity and its applications
Volume177
Issue number4-6
DOIs
Publication statusPublished - 1991 Jul 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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