Highly textured oxypnictide superconducting thin films on metal substrates

Abstract

Highly textured NdFeAs(O,F) thin films have been grown on ion beam assisted deposition (IBAD)-MgO/Y2O3/Hastelloy substrates by molecular beam epitaxy. The oxypnictide coated conductors showed a superconducting transition temperature (Tc) of 43 K with a self-field critical current density (Jc) of 7.0 x 104 A/cm2 at 5 K, more than 20 times higher than powder-in-tube processed SmFeAs(O,F) wires. Albeit higher Tc as well as better crystalline quality than Co-doped BaFe2As2 coated conductors, in-field Jc of NdFeAs(O,F) was lower than that of Co-doped BaFe2As2. These results suggest that grain boundaries in oxypnictides reduce Jc significantly compared to that in Co-doped BaFe2As2 and, hence biaxial texture is necessary for high Jc.

arXiv comment4 pages, 4 figures

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Cited by in corpus (9)

• Recent advances in iron-based superconductors toward applications
• Fe-based superconducting thin films on metallic substrates: growth, characteristics and relevant properties
• Grain boundary characteristics of Fe-based superconductors
• Enhanced critical-current in P-doped BaFe2As2 thin films on metal substrates arising from poorly aligned grain boundaries
• BaFe2(As1-xPx)2 (x = 0.22-0.42) thin films grown on practical metal-tape substrates and their critical current densities
• Nanoscale Texture and Microstructure in NdFeAs(O,F)/IBAD-MgO Superconducting Thin Film with Superior Critical Current Properties
• Particulate Generation on Surface of Iron Selenide Films by Air Exposure
• Fabrication of grain boundary junctions using NdFeAs(O,F) superconducting thin films
• Grain boundary characteristics of oxypnictide NdFeAs(O,F) superconductors