Flux pinning in Ba1-xKxFe2As2 superconductor with splayed columnar defects

被引：10
|
作者：
Park, A. [1 ]
Pyon, S. [1 ]
Tamegai, T. [1 ]
Kambara, T. [2 ]
机构：
[1] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1138656, Japan
[2] RIKEN, Nishina Ctr, 2-1 Hirosawa, Wako, Saitama 3510198, Japan
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2016年 / 530卷
关键词：
Iron-based superconductor; Critical current density; Vortex; Flux pinning; Heavy ion irradiation; Columnar defects; YBA2CU3O7; CRYSTALS; VORTEX MOTION;
D O I：
10.1016/j.physc.2016.02.014
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
It has been theoretically proposed that the enhancement of the critical current density (J(c)) through dispersing the angle of columnar defects should be greater than that of parallel columnar defects. Yet, the complication caused by decrease in pinning owing to vortex-field misalignment upon tilting of columnar defect makes it a crucial task to determine the optimal splay angle in order to fully take advantage of enhanced pinning among splayed systems. Using Ba0.6K0.4Fe2As2 as a target material, we probe the effects of various splay angles on J(c) and determine that the 'optimal-angle' lies within the small angle range (0-10 degrees). (C) 2016 Published by Elsevier B.V.
引用
收藏
页码：58 / 61
页数：4
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