Critical current density and vortex dynamics in pristine and proton-irradiated (Ba, K)Fe2As2

被引：6
|
作者：
Taen, Toshihiro [1 ]
Ohori, Takahiro [1 ]
Ohtake, Fumiaki [1 ]
Tamegai, Tsuyoshi [1 ]
Kihou, Kunihiro [2 ]
Ishida, Shigeyuki [2 ]
Eisaki, Hiroshi [2 ]
Kitamura, Hisashi [3 ]
机构：
[1] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan
[2] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058568, Japan
[3] Natl Inst Radiol Sci, Radiat Measurement Res Sect, Inage Ku, Chiba 2638555, Japan
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2013年 / 494卷
关键词：
Iron-based superconductors; Critical current density; Vortex dynamics; MAGNETIZATION;
D O I：
10.1016/j.physc.2013.04.027
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Magnetization and flux creep in pristine and 3 MeV proton-irradiated Ba0.5K0.5Fe2As2 single crystals with a dose of 5.3 x 10(16) cm(-2) are measured. Both the pristine and irradiated samples show sharp superconducting transitions, demonstrating the homogeneity of the sample. The sharp central peak in the pristine sample becomes broader after the irradiation. Commonly observed fish-tail effects in iron-based superconductors disappear in the highly disordered sample after the irradiation. The normalized relaxation rate shows a large field dependence in the pristine sample, while it is weakly field dependent in the proton irradiated sample. The dip structure around zero-field is attributed to either the self-field effect or individual pinning. (c) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：106 / 108
页数：3
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