YBa2Cu3O7-x_500-600 K isostructural phase transition and its influence on critical-current value

E. Dul'kin*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

YBa2Cu3O7-x ceramic samples voltage-current characteristics at 77 K and acoustic emission activity during thermocycling 500-600 K region have been studied. Partial oxygen sorption by these samples through heating has been established by critical-current value and acoustic emission activity at 540-550 K. During thermocycling an acoustic emission maximums have been observed on 3rd and 6th thermocycles, and these maximums correlate with some decrease of the critical-current value. It is shown that observed acoustic emission maximums are because of a phase-work hardening during thermocycling of these samples. A mechanism of this phasework hardening influencing the critical-current value in YBa2Cu3O7-x ceramic samples is discussed.

Original languageAmerican English
Pages (from-to)953-956
Number of pages4
JournalJournal of Superconductivity and Novel Magnetism
Volume16
Issue number6
StatePublished - 2003

Keywords

  • Acoustic emission
  • Critical current
  • Dislocation
  • Phase-work hardening
  • Voltage-current characteristic

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