Development of very high Jc in Ba(Fe1-xCox)2As2 thin films grown on CaF2

被引：43

作者：

Tarantini, C. ^{[1
]}

Kametani, F. ^{[1
]}

Lee, S. ^{[2
]}

Jiang, J. ^{[1
]}

Weiss, J. D. ^{[1
]}

Jaroszynski, J. ^{[1
]}

Hellstrom, E. E. ^{[1
]}

Eom, C. B. ^{[2
]}

Larbalestier, D. C. ^{[1
]}

机构：

[1] Florida State Univ, Applied Superconduct Ctr, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA

[2] Univ Wisconsin, Dept Mat Sci & Engn, Madison, WI 53706 USA

来源：

SCIENTIFIC REPORTS | 2014年 / 4卷

基金：

美国国家科学基金会;

关键词：

NB3SN CONDUCTOR DEVELOPMENT; SUPERCONDUCTIVITY;

D O I：

10.1038/srep07305

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Ba(Fe1-xCox)(2)As-2 is the most tunable of the Fe-based superconductors (FBS) in terms of acceptance of high densities of self-assembled and artificially introduced pinning centres which are effective in significantly increasing the critical current density, J(c). Moreover, FBS are very sensitive to strain, which induces an important enhancement in critical temperature, T-c, of the material. In this paper we demonstrate that strain induced by the substrate can further improve J(c) of both single and multilayer films by more than that expected simply due to the increase in T-c. The multilayer deposition of Ba(Fe1-xCox)(2)As-2 on CaF2 increases the pinning force density (F-p=J(c) x mu H-0) by more than 60% compared to a single layer film, reaching a maximum of 84 GN/m(3) at 22.5 T and 4.2 K, the highest value ever reported in any 122 phase.

引用

页数：8

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