The binary nickel composite ferrite NiA_yFe_2-yO₄( A = Ce,Nd,La,Y,y = 0 . 1 ) were prepared under the same condition via sol-gel method. The structure and magnetic property of powder were characterized. The results show that the replacement of four kinds of ions can form super paramagnetic nickel-based ferrite powder at room temperature. Y³⁺deping can form pure nickel-based ferrite. After the ions replacement, 着义 and 着义 of the ferrite samples has increased during 2 ~ 18 GHz,especially La³⁺doping is obvious effect . The real part of complex permeability 滋忆 and imaginary part 滋义 of the four samples being replaced by Ce³⁺,Nd³⁺,La³⁺,Y³⁺has little change compare with NiFe₂O₄during 2 ~ 18 GHz. The radius of the dopant ions and the doping amount of the change of electromagnetic parameters play a major role.