Reduction of flux creep by heat pulses
Reduction of flux creep by heat pulses
复制标题
减少热脉冲引起的磁通蠕变
DOI：
10.1063/1.120661
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发表时间：
1998
影响因子：
4
通讯作者：
M. Maple
中科院分区：
文献类型：
--
作者：
G. Levin;C. Almasan;D. Gajewski;M. Maple
我们研究了在T0处产生临界状态后，通过暂时将温度T提高到工作温度T0以上来减少高温超导体中巨通量蠕变的可能性。这种T的增加导致超临界状态，其迅速衰减，使得当T降低回到T0时，超导体处于亚临界状态。我们已经发现，最大持续电流和弛豫速率都是滞后的，并且与焊剂退火后测得的相应量有很大不同。
We investigated the possibility of reducing the giant flux creep in high-temperature superconductors by temporarily increasing the temperature T above the operating temperature T0, after the critical state is created at T0. This T increase leads to a supercritical state which decays rapidly so that, when T is decreased back to T0, the superconductor is in the subcritical state. We have found that both the maximum persistent current and the relaxation rate are hysteretic and differ substantially from the corresponding quantities measured after flux annealing.