supported by the Beijing Municipal Science and Technology Commission (Grant No. Z09010300820907);the National Natural Science Foundation of China (Grant No. 50802093);the National Basic Research Program of China (Grant No. 2006CB601004)
The superconducting properties of polycrystalline Sr0.6K0.4Fe2As2 were strongly influenced by Ag doping(Supercond.Sci.Technol.23(2010) 025027).Ag addition is mainly dominated by silver diffusing,so the annealing proce...