超导薄膜热磁不稳定性的振荡区
Oscillatory regimes of the thermomagnetic instability in superconducting films
摘要：
本文从理论上研究了超导薄膜对热磁雪崩振荡先驱模的稳定性。的起始阈值的结果表明，以前的治疗非振荡模式预测更高的阈值。因此，在薄膜超导体中，振荡模式更容易引起热磁击穿。这解释了实验事实，即即使在很小的斜坡率的施加磁场的薄膜超导体的磁通雪崩可以发生。闭合表达式的阈值磁场和温度，以及振荡频率，推导出不同制度的振荡热磁不稳定性。
英文摘要：
The stability of superconducting films with respect to oscillatory precursor modes for thermomag- netic avalanches is investigated theoretically. The results for the onset threshold show that previous treatments of non-oscillatory modes have predicted much higher thresholds. Thus, in film supercon- ductors, oscillatory modes are far more likely to cause thermomagnetic breakdown. This explains the experimental fact that flux avalanches in film superconductors can occur even at very small ramping rates of the applied magnetic field. Closed expressions for the threshold magnetic field and temperature, as well oscillation frequency, are derived for different regimes of the oscillatory thermomagnetic instability.
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