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

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

2011-05-17

arxiv.org/abs/1105.3342v2

Applied Physics Express 4 (2011) 063102

Physics

Condensed Matter

Superconductivity

11 pages, 4 figures

Scientific paper

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.

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