Anderson flux creep model and relaxation of persistent current in grain-aligned Y1Ba2Cu3O7-δ

J. Jung, I. Isaac, M. Murakami, M. A.K. Mohamed

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Flux-creep-induced relaxation of persistent current was investigated close to Tc in a ring-shaped grain-aligned Y1Ba2Cu3O7-σ (YBCO) with the c-axis perpendicular to the ring's plane. The results revealed two distinct relaxation regimes: a steady-state logarithmic relaxation of the persistent current from an initial value Jo ≅ Jc with the energy barrier Ueff(J) = Uo(1-J/Jc) where Uo ≅ 0.4 eV, and a non-steady-state (non-lo garithmic) one from Jo < - 0.8 Jc, with Ueff(J) = constant at fixed value of time.

Original languageEnglish
Pages (from-to)2879-2880
Number of pages2
JournalPhysica C: Superconductivity and its applications
Volume235-240
Issue numberPART 5
DOIs
Publication statusPublished - 1994 Dec
Externally publishedYes

ASJC Scopus subject areas

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

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