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High-performance Sr0.6K0.4Fe2As2 (Sr-122) tapes have been successfullyfabricated using hot pressing (HP) process. The effect of HP temperatures(850-925 C) on the c-axis texture, resistivity, Vickers micro-hardness,microstructure and critical current properties has been systematically studied.Taking advantage of high degree of c-axis texture, well grain connectivity andand large concentration of strong-pinning defects, we are able to obtain anexcellent Jc of 1.2x10^5 A/cm^2 at 4.2 K and 10 T for Sr-122 tapes. Moreimportantly, the field dependence of Jc turns out to be very weak, such that in14 T the Jc remains ~1.0x10^5 A/cm^2. These Jc values are the highest everreported so far for iron-pnictide wires and tapes, achieving the level desiredfor practical applications. Our results clearly strengthen the position ofiron-pnictide conductors as a competitor to the conventional and MgB2superconductors for high field applications.

Hot pressing to enhance the transport Jc of Sr0.6K0.4Fe2As2 superconducting tapes