The influence of post-growth thermal treatments on the critical current density of TSMG YBCO bulk superconductors

P. Diko, V. Antal, K. Zmorayová, M. Šefčiková, X. Chaud, J. Kováč, X. Yao, I. Chen, M. Eisterer, H. W. Weber

研究成果: Article同行評審

11 引文 斯高帕斯(Scopus)

摘要

Oxygenation and thermochemical post-growth treatments of top seeded melt-growth (TSMG) YBCO bulk superconductors can significantly influence critical current density. It is shown that, depending on oxygenation conditions and the size of 211 particles, different reductions of intrinsic critical current density values can be obtained due to the reduction in the sample cross-section caused by the presence of a/b-microcracks induced by 211 particles, and a/b- and a/c-cracks induced by oxygenation. The possibility of eliminating oxygenation cracks by high pressure oxygenation and consequently significantly increasing the macroscopic critical current density is demonstrated. An effective dopant concentration for chemical pinning is proposed and possible clustering of substitutions in the Y123 lattice by thermochemical treatments is shown.

原文English
文章編號124002
期刊Superconductor Science and Technology
23
發行號12
DOIs
出版狀態Published - 2010 十二月

All Science Journal Classification (ASJC) codes

  • 陶瓷和複合材料
  • 凝聚態物理學
  • 金屬和合金
  • 電氣與電子工程
  • 材料化學

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