Evidence for collective pinning in high-temperature superconductors

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

研究成果: Article同行評審

7 引文 斯高帕斯(Scopus)

摘要

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.

原文English
頁(從 - 到)13598-13601
頁數4
期刊Physical Review B
43
發行號16
DOIs
出版狀態Published - 1991

All Science Journal Classification (ASJC) codes

  • 凝聚態物理學

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