高T_c氧化物超导体应用子4.2K强场磁体的稳定性问题的研究

A Research on the Stability of High Tc Superconductors Used to High Magnetic Fields at 4.2K

高Tc氧化物超导体应用于4.2K强场磁体的可能性使得对其磁热稳定性问题的研究显得十分重要。本文以Bi-2212为例,分析了Bi-2212超导体的绝热稳定性,动态稳定性、磁通跳跃场、自场磁通跳跃稳定性及临界长度,并将它与NbTi的相应参数进行了比较.结果表明,Bi-2212具有比NbTi优越得多的稳定性,并且它总是内稳定的。

In this paper,the stability of high Tc superconductors used to high magnetic fields at 4.2k was studied and some stability parameters were presented.The.results show that the high Tc superconductors arc more stable then the low Tc superconductors and the high Tc superconductors are always intrinsically stable.