Evidence for collective pinning in high-temperature superconductors

Y. Y. Xue, Z. J. Huang, P. H. Hor, C. W. Chu

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

The relaxation behavior of the remnant moments of two thin-wall rings, one closed and the other open, and powders of various sizes of melt-textured YBa2Cu3O7 has been investigated. The activation energies (U0's) obtained are the same at all temperatures in all cases, directly demonstrating that the relaxation in a high-temperature superconductor (HTS) cannot be explained in terms of a distribution of U0's associated with different domains as previously suggested. A temperature-dependent pinning volume of flux bundles is necessary to account for the experimental results. A scaling relationship, U0[1-(T/Tc)2]m/(BJ2)k, is therefore proposed for such a collective pinning to explain the macroscopic properties of HTS's.

Original languageEnglish
Pages (from-to)13598-13601
Number of pages4
JournalPhysical Review B
Volume43
Issue number16
DOIs
Publication statusPublished - 1991

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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