High, magnetic field independent critical currents in (Ba,K)Fe2As2 crystals

被引：89

作者：

Fang, L. ^{[1
]}

Jia, Y. ^{[1
]}

Chaparro, C. ^{[1
]}

Sheet, G. ^{[1
]}

Claus, H. ^{[1
]}

Kirk, M. A. ^{[1
]}

Koshelev, A. E. ^{[1
]}

Welp, U. ^{[1
]}

Crabtree, G. W. ^{[1
]}

Kwok, W. K. ^{[1
]}

Zhu, S. ^{[2
]}

Hu, H. F. ^{[3
]}

Zuo, J. M. ^{[4
]}

Wen, H-H. ^{[5
,6
]}

Shen, B. ^{[5
,6
]}

机构：

[1] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA

[2] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA

[3] Univ Illinois, Dept Phys, Urbana, IL 61801 USA

[4] Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA

[5] Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China

[6] Nanjing Univ, Ctr Superconducting Phys & Mat, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2012年 / 101卷 / 01期

关键词：

CO-DOPED BAFE2AS2; GRAIN-BOUNDARIES; ION IRRADIATION; HEAVY-IONS; SUPERCONDUCTORS; DEFECTS;

D O I：

10.1063/1.4731204

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Each discovery of a new high temperature superconductor drives the expectation that advanced engineering of materials defect structures will enable effective vortex pinning and high values of the electrical current density. Here, we demonstrate that single crystals of the iron-based superconductor Ba0.6K0.4Fe2As2 with T-c = 37.5K can accommodate an unprecedented large concentration of strong-pinning defects in the form of discontinuous nm-sized nanorods with no degradation of the superconducting transition temperature. At a temperature of 5K, we find a critical current density of 5 MA/cm(2) that is magnetic field independent in fields up to 7 T. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4731204]

引用

页数：5

共 37 条

[1] Properties of recent IBAD-MOCVD coated conductors relevant to their high field, low temperature magnet use [J].