Relationship among flux depinning, irreversibility and phase transition in a disordered HTS material
Relationship among flux depinning, irreversibility and phase transition in a disordered HTS material
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无序高温超导材料中通量脱钉、不可逆性和相变之间的关系
DOI：
10.1088/0953-2048/12/12/310
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发表时间：
1999
影响因子：
3.6
通讯作者：
F. Irie
中科院分区：
文献类型：
--
作者：
T. Kiss;T. Matsushita;T. Matsushita;F. Irie
本文在系统测量YBCO薄膜中电场（E）-电流密度（J）曲线的基础上，研究了磁通钉扎对高温超导体中涡旋玻璃-液体（GL）相变和不可逆性的影响。结果表明，GL转变与由宏观钉扎强度的最小值所决定的热脱钉扎是一致的。E-J特性的等温标度与钉扎的性质直接相关。不可逆性线可以描述为由统计pin分布控制的iso-J线。如果我们确定了不可逆线的判据，我们就可以根据去钉扎线来描述不可逆线。因此，基本的物理量，可以归因于磁通脱钉。
The influence of flux pinning on the vortex glass-liquid (GL) phase transition and irreversibility in HTSs has been examined on the basis of systematic measurements of electric field (E) versus current density (J) curves in a YBCO thin film. It has been shown that the GL transition is identical to the thermal depinning determined by the minimum value of the macroscopic pinning strength. The isothermal scaling of the E-J characteristics is directly related to the nature of the pinning. The irreversibility line can be described as an iso-J line governed by the statistical pin distribution. If we determine the criteria for the irreversibility line, we can describe the irreversibility line based on the depinning line. The essential physical quantity, therefore, can be attributed to the flux depinning.