2011/03/09 by Kazumasa Togano, Akiyoshi Matsumoto, Hiroaki Kumakura
Materials Science · Physics and Astronomy · #Composite number #Critical current #Critical field #Current (fluid) #Iron-based superconductors research #Physics of Superconductivity and Magnetism #Process (computing) #Superconducting wire #Superconductivity #Superconductivity in MgB2 and Alloys #cond-mat.supr-con
paper · pdf · doi:10.1143/apex.4.043101
in press for Appl. Phys. Express
arxiv created 2011/03/09 · openalex publication_date 2011/03/23 · arxiv updated 2015/05/27 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We report large transport critical current densities observed in Ag-added (Ba,K)Fe 2 As 2 superconducting wires prepared by an ex-situ powder-in-tube (PIT) process. The wire has a simple composite structure sheathed only by Ag. A precursor bulk material prepared by a melting process was ground into powder and put into a Ag tube. The composite was then cold worked into a wire and heat treated at 850 °C for sintering. Transport critical current densities, J c , at 4.2 K are 1.0 × 10 4 A/cm 2 ( I c = 60.7 A) in self field and 1.1 × 10 3 A/cm 2 ( I c = 6.6 A) in 10 T. These are the highest values reported so far for the Fe-based superconducting wires.