论文标题
沉积在玻璃基板上的NB膜中的热磁不稳定性
Thermomagnetic instabilities in Nb films deposited on glass substrates
论文作者
论文摘要
在这项工作中，我们在玻璃基板上沉积的不同厚度的niobium膜中提供了磁场穿透过程和雪崩形成的系统研究。该研究是通过使用磁光成像直接可视化磁通量进行的。将实验数据与薄膜中的手指或树突通量雪崩形式的形式的热磁不稳定性的发展进行了比较。分析超导体首先变得不稳定的阈值磁场的温度和厚度依赖性，以及与该场相对应的通量穿透深度，可以评估所研究膜的热和超导参数，例如跨膜边界边界，热电导率，关键的电流密度，诸如传热系数，例如传热系数。
In this work, we provide a systematic study of the magnetic field penetration process and avalanche formation in niobium films of different thicknesses deposited on glass substrates. The research was carried out by means of direct visualization of the magnetic flux using magneto-optical imaging. The experimental data were compared with theoretical predictions for the development of thermomagnetic instabilities in the form of finger or dendritic flux avalanches in thin films. Analysis of the temperature and thickness dependence of threshold magnetic field at which superconductor first becomes unstable, as well as the flux penetration depth corresponding to this field allows the evaluation of the thermal and superconducting parameters of the studied films, such as heat transfer coefficient across the film-substrate boundary, thermal conductivity, critical current density.
