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Sr 2 IrO 4 has been shown to exhibit a novel J eff =1/2 Mott spin-orbit insulating state with antiferromagnetic ordering. In the present investigation, the effects of Pr substitution at Sr-site on structural, magnetic and electrical properties are studied in Sr 2 IrO 4 . Pr-doped samples still retain the insulating behavior, but with the increase of Pr doping concentration, the resistivity decreases. The magnetic properties show that long-range antiferromagnetic order is collapsed when the Prdoi:10.1088/2053-1591/ab5f6d fatcat:bjn22so7i5hqrpxie3dushh6me