Magnetic self-field entry into a current-carrying type-II superconductor. III. General criterion of penetration for an external field of arbitrary direction
Magnetic self-field entry into a current-carrying type-II superconductor. III. General criterion of penetration for an external field of arbitrary direction
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DOI：
10.1103/physrevb.57.1164
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发表时间：
1998-01-01
影响因子：
3.7
通讯作者：
Freyhardt, HC
中科院分区：
文献类型：
--
作者：
Genenko, YA;Snezhko, AV;Freyhardt, HC
在伦敦近似的框架下，考虑了外磁场作用下载流圆柱形II型超导体的首次磁通穿透。本文根据任意平面涡旋的精确解计算了下横向临界场和表面第一涡旋形核的临界场。结合以前对载流超导体中平行磁场穿透的考虑[Phys.Rev.B 49，6950（1994）和B 51，3686（1995）]，上述结果使我们能够用公式表示在任意方向的外场作用下，任意横向尺寸的载流样品中第一磁通入口的一般判据。
The first magnetic-flux penetration into a current-carrying cylindrical type-II superconductor subjected to an external magnetic field is considered in the frame of the London approximation. The lower transverse critical field as well as critical field of the first vortex nucleation at the surface are evaluated on the basis of an exact solution for a vortex of arbitrary flat configuration. Taken together with the previous consideration of the parallel magnetic-field penetration in a current-carrying superconductor [Phys. Rev. B 49, 6950 (1994) and B 51, 3686 (1995)] the above results allow us to formulate the general criterium for the first flux entry in the current-carrying samples of arbitrary transverse size subjected to an external field of arbitrary direction.