Critical current density and vortex dynamics in uranium irradiated Co-doped BaFe2As2

被引：15
|
作者：
Yagyuda, H. [1 ]
Nakajima, Y. [1 ,2 ]
Tamegai, T. [1 ,2 ]
Kanai, Y. [3 ]
Kambara, T. [4 ]
机构：
[1] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan
[2] Transformat Res Project Iron Pnictide TRIP, JST, Bunkyo Ku, Tokyo 1138656, Japan
[3] RIKEN, Atom Phys Lab, Wako, Saitama 3510198, Japan
[4] RIKEN, Nishina Ctr, Wako, Saitama 3510198, Japan
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2011年 / 471卷 / 21-22期
关键词：
Iron-pnictide superconductor; Critical current density; Suppression of transition temperature; COLUMNAR DEFECTS; FIELD; SUPERCONDUCTIVITY; PROFILE; PHASE;
D O I：
10.1016/j.physc.2011.05.056
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report the effect of defects introduced by heavy-ion irradiation with 2.6 GeV uranium ions at several matching fields in single crystalline Ba(Fe0.92Co0.075)(2)As-2. The suppression rate of T, at lower matching fields is larger than that at higher matching fields. The critical current density calculated from magnetic hysteresis loop is enhanced up to 4.1 x 10(6) A/cm(2) at 2 K. Clear dips in magnetic hysteresis loops near zero field are observed at high matching fields. Field dependence of normalized relaxation rate is suppressed, and the relationship between the dip and the relaxation rate is discussed. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：790 / 793
页数：4
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