Iron-chalcogenide FeSe${}_{0.5}$Te${}_{0.5}$ coated superconducting tapes for high field applications

Abstract

The high upper critical field characteristic of the recently discovered iron-based superconducting chalcogenides opens the possibility of developing a new type of non-oxide high-field superconducting wires. In this work, we utilize a buffered metal template on which we grow a textured FeSe${}_{0.5}$Te${}_{0.5}$ layer, an approach developed originally for high temperature superconducting coated conductors. These tapes carry high critical current densities (>1$\times 10^4$A/cm${}^2$) at about 4.2K under magnetic field as high as 25 T, which are nearly isotropic to the field direction. This demonstrates a very promising future for iron chalcogenides for high field applications at liquid helium temperatures. Flux pinning force analysis indicates a point defect pinning mechanism, creating prospects for a straightforward approach to conductor optimization.

Accepted for publication in Appl. Phys. Lett

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• Fe-based superconducting thin films on metallic substrates: growth, characteristics and relevant properties
• Thin Film Growth and Device Fabrication of Iron-Based Superconductors
• Development of very high Jc in Ba(Fe1-xCox)2As2 thin films grown on CaF2
• Unabridged phase diagram for single-phased FeSexTe1-x thin films
• Grain boundary characteristics of Fe-based superconductors
• Oxypnictide SmFeAs(O,F) superconductor: a candidate for high-field magnet applications
• Microstructural magnetic phases in superconducting FeTe0.65Se0.35
• High-field transport properties of a P-doped BaFe2As2 film on technical substrate
• Interface control by homoepitaxial growth in pulsed laser deposited iron chalcogenide thin ilms
• Enhancement of superconducting properties in FeSe wires using a quenching technique
• Microstructural and transport properties of superconducting FeTe0.65Se0.35 crystals
• BaFe2(As1-xPx)2 (x = 0.22-0.42) thin films grown on practical metal-tape substrates and their critical current densities
• Sulfur annealing effect for superconductivity in iron chalcogenide compounds
• Particulate Generation on Surface of Iron Selenide Films by Air Exposure
• Magneto-optical characterizations of FeTe${}_{0.5}$Se${}_{0.5}$ thin films with critical current density over 1 MA/cm${}^2$