A possible new vortex phase boundary in YBa2Cu3O7

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

研究成果: Article同行評審

18 引文 斯高帕斯(Scopus)

摘要

Measurements of flux creep in melt-textured YBa2Cu3O7-δ (Y1:2:3) samples have been extended to magnetic fields up to 5.5 T and temperatures up to 85 K. In contrast to behavior at low fields and low temperatures, the decay of the magnetization is highly nonlogarithmic. At such fields and temperatures, the relative relaxation rate dlnM/dlnt changes from an essentially temperature-independent behavior to a rapid increase with temperature as the temperature and field exceed certain values. In other words, the creep barrier U(t) at a fixed observation time t starts to decrease at high temperature following the initial increase previously observed. The observations suggest the possible existence of a new phase boundary in the TH phase diagram below the irreversibility line.

原文English
頁(從 - 到)195-202
頁數8
期刊Physica C: Superconductivity and its applications
176
發行號1-3
DOIs
出版狀態Published - 1991 5月 15

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 凝聚態物理學
  • 能源工程與電力技術
  • 電氣與電子工程

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