Nucleation and collapse of the superconducting phase in type-I superconducting films.
Nucleation and collapse of the superconducting phase in type-I superconducting films.
复制标题
I 型超导薄膜中超导相的成核和塌陷。
DOI：
10.1103/physrevlett.96.087002
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发表时间：
2005
影响因子：
8.6
通讯作者：
A. Cēbers
中科院分区：
文献类型：
--
作者：
C. Gourdon;V. Jeudy;A. Cēbers
利用磁光成像技术研究了I型超导薄膜中中间态和正常态之间的相变。发现了不同过渡场下超导畴的坍缩和成核的磁滞现象，并伴随着以环形畴坍缩和层状畴出现为特征的拓扑磁滞现象。磁滞所示，从过冷和过热状态。由于长程磁相互作用引起的畴形不稳定性是拓扑磁滞的主要原因。
The phase transition between the intermediate and normal states in type-I superconducting films is investigated using magneto-optical imaging. Magnetic hysteresis with different transition fields for collapse and nucleation of superconducting domains is found. This is accompanied by topological hysteresis characterized by the collapse of circular domains and the appearance of lamellar domains. Magnetic hysteresis is shown to arise from supercooled and superheated states. Domain-shape instability resulting from long-range magnetic interaction accounts well for topological hysteresis.