Multiple flux jumps and irreversible behavior of thin Al superconducting rings
Multiple flux jumps and irreversible behavior of thin Al superconducting rings
复制标题
薄铝超导环的多次通量跳跃和不可逆行为
DOI：
10.1103/physrevb.67.054506
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
A. Geim
中科院分区：
文献类型：
--
作者：
D. Vodolazov;F. M. Peeters;S. Dubonos;A. Geim
对细观铝超导环的磁通跃变和不可逆磁化曲线进行了实验和理论研究。在小磁场区域，涡度随磁场的变化可能大于1。这种行为与不同涡度的几种亚稳态的存在有关。在环中故意引入缺陷对磁通跳跃的大小有很大影响。基于时间相关的 Ginzburg-Landau 模型的计算使我们能够半定量地解释实验结果。
An experimental and theoretical investigation was made of flux jumps and irreversible magnetization curves of mesoscopic Al superconducting rings. In the small magnetic-field region the change of vorticity with magnetic field can be larger than unity. This behavior is connected with the existence of several metastable states of different vorticities. The intentional introduction of a defect in the ring has a large effect on the size of the flux jumps. Calculations based on the time-dependent Ginzburg-Landau model allows us to explain the experimental results semiquantitatively.