Artificial and self-assembled vortex-pinning centers in superconducting Ba(Fe1-xCox)(2)As-2 thin films as a route to obtaining very high critical-current densities

作者：Tarantini C^*; Lee S; Kametani F; Jiang J; Weiss J D; Jaroszynski J; Folkman C M; Hellstrom E E; Eom C B; Larbalestier D C

来源：Physical Review B, 2012, 86(21): 214504.

DOI：10.1103/PhysRevB.86.214504

We report on the superior vortex pinning of single-and multilayer Ba(Fe1-xCox)(2)As-2 thin films with self-assembled c-axis and artificially introduced ab-plane pins. Ba(Fe1-xCox)(2)As-2 can accept a very high density of pins (15-20 vol %) without T-c suppression. The matching field is greater than 12 T, producing a significant enhancement of the critical current density J(c), an almost isotropic J(c) (theta, 20 T) %26gt; 10(5) A/cm(2), and global pinning force density F-p of similar to 50 GN/m(3). This scenario strongly diffe

• 出版日期2012-12-7