High transport critical current densities in textured Fe-sheathed Sr1−xKxFe2As2+Sn superconducting tapes
High transport critical current densities in textured Fe-sheathed Sr1−xKxFe2As2+Sn superconducting tapes
We report the realization of grain alignment in Sn-added Sr1-xKxFe2As2 superconducting tapes prepared by ex-situ powder-in-tube method. At 4.2 K, high transport critical current densities Jc of 2.5x10^4 A/cm^2 (Ic = 180 A) in self-field and 3.5x10^3 A/cm^2 (Ic = 25.5 A) in 10 T have been measured. These values …