Thickness dependence of structural and superconducting properties of Co-doped BaFe₂As₂ coated conductors.

ABSTRACT: High-quality Co-doped BaFe₂As₂ thin films with thickness up to 2 μm were realized on flexible metal tapes with LaMnO₃ as buffer layers fabricated by an ion beam-assisted deposition technique. Structural analysis indicates that increasing thickness does not compromise the film crystallinity, except for a small amount of impurities. Two types of thickness dependence of critical current density (J _c) were found: one is almost thickness independent in the range of 0.6-1.5 μm and the other is highly thickness dependent. In addition, the maximum value for crucial current I _c at 9 T and 4.2 K is about 55 A/12 mm-W for the 1.5-μm-thick film. Anisotropic Ginzburg-Landau scaling demonstrates that dominant pinning centers develop fr

SUBMITTER: Xu Z 

PROVIDER: S-EPMC8361216 | biostudies-literature | 2021 Aug

REPOSITORIES: biostudies-literature