Thermal instability, magnetic field shielding and trapping in single-grain YBa2Cu3O7-δ bulk materials

L. Gao, Y. Y. Xue, R. L. Meng, C. W. Chu

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30 引文 斯高帕斯(Scopus)

摘要

We report results on the temperature dependence of the trap field B T and the thermal instability (flux jump) field Hfj in single-grain YBa2Cu3O7-δ disks. Above 45 K, BT is limited by the critical current density Jc and BT=BT0(1-T/Tc)q with q≊1.67. At 4.2 K, the first flux jump field Hfj of ∼3 T is about an order of magnitude larger than theoretical prediction based on the adiabatic thermal instability model. We also find that the occurrence of large flux avalanches probably causes severe microcracking damages to the superconducting disks.

原文English
頁(從 - 到)520-522
頁數3
期刊Applied Physics Letters
64
發行號4
DOIs
出版狀態Published - 1994

All Science Journal Classification (ASJC) codes

  • 物理與天文學(雜項)

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