Effective Ex-Situ Fabrication of F-Doped SmFeAsO Wire for High Transport Critical Current Density

Abstract

We demonstrate the fabrication of superconducting SmFeAsO1-xFx (Sm-1111) wires by using the ex-situ powder-in-tube technique. Sm-1111 powder and a binder composed of SmF3, samarium arsenide, and iron arsenide were used to synthesize the superconducting core. Although the F content of Sm-1111 is reduced in the process of ex-situ fabrication, the binder compensates by sufficiently supplementing the F content, thereby preventing a decrease in the superconducting transition temperature and a shrinkage of the superconducting volume fraction. Thus, in the superconducting Sm-1111 wire with the binder, the transport critical current density reaches the highest value of ~4 kA/cm2 at 4.2 K.

11 pages, 4 figures

References in corpus (5)

• Very High Field Two-Band Superconductivity in LaFeAsO_0.89F_0.11
• Upper critical fields well above 100 T for the superconductor SmFeAsO${}_{0.85}$F${}_{0.15}$ with T${}_c$ = 46 K
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• Large Transport Critical Current Densities of Ag Sheathed (Ba,K)Fe2As2+Ag Superconducting Wires Fabricated by an ex-situ Powder-in-Tube (PIT) Process
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Cited by in corpus (19)

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• Phase diagram and superconductivity at 58.1 K in α-FeAs free SmFeAsO1-xFx
• Thin Film Growth and Device Fabrication of Iron-Based Superconductors
• Oxypnictide SmFeAs(O,F) superconductor: a candidate for high-field magnet applications
• Superconducting properties and magneto-optical imaging of Ba0.6K0.4Fe2As2 PIT wires with Ag addition
• Highly textured oxypnictide superconducting thin films on metal substrates
• Enhanced high-field transport critical current densities observed for the ex-situ PIT processed Ag/(Ba,K)Fe2As2 thin tapes
• Large enhancement of transport critical current density of ex-situ PIT Ag/(Ba,K)Fe2As2 tapes achieved by applying cycles of cold deformation and heat treatment
• Enhancement of superconducting properties in FeSe wires using a quenching technique
• Enhancement of transport critical current density of SmFeAsO1-xFx tapes fabricated by an ex-situ powder-in-tube method with a Sn-presintering process
• Crystal structure instability of FeSe grains: Formation of non-superconducting phase at the grain surface
• Density effect on critical current density and flux pinning properties of polycrystalline SmFeAsO1-xFx superconductor
• Effect of starting materials on the superconducting properties of SmFeAsO1-xFx tapes
• Analysis of interdiffusion between SmFeAsO0.92F0.08 and metals for ex situ fabrication of superconducting wire
• α-FeAs-free SmFeAsO1-xFx by low temperature sintering with slow cooling
• Effect of the indium addition on the superconducting property and the impurity phase in polycrystalline SmFeAsO1-xFx
• Evolution of tetragonal phase in the FeSe wire fabricated by a novel chemical-transformation PIT process