Synthesis And Magnetoelectric Properties Of Eperovskite Iridium Based Multi Component Oxide

In recent years,strong spin-orbit coupling materials have attracted much attention due to their singular magnetoelectric behavior.However,for 5 d transition metal oxides,the preparation of single phase perovskite iridium oxides usually requires harsh high-pressure synthesis conditions.Based on the concept of single phase synthesis of high entropy compounds,perovskiteiridiummulticomponentoxidesSr(Fe_0.05Co_0.05Co_0.05(Ru_xIr_1-x)_0.8Zn_0.1)O₃（SMO,x=0¹）were prepared by high temperature solid state reaction for the first time,and its magnetoelectric characteristics are systematically studied.First,we find that when x≤0.3,the multicomponent oxides have obvious heterogenous phase formation,but when 0.4≤x≤1,the multicomponent oxides show a good orthogonal structure symmetry single phase.The magneto-electric measurements show that although multiple sets of oxides have single phase and chemical composition uniformity,they all exhibit complex magnetoelectric behavior,including low temperature spin glass states,two step magnetic transitions immediately adjacent to the high temperature region,and Griffiths phase above Curie temperature.What is more interesting is that with the change of the Ru substitution and the external magnetic field,the two-step adjacent magnetic phase transition shows the evolution of the system.Based on the strong spin orbit coupling effect of iridium based oxides and the disorder of the mismatch between multiple groups of meta ions,we have explained the singular magneto-electric characteristics.