Fabrication and magnetic property of novel (Co,Zn,Fe,Mn,Ni)3O4 high-entropy spinel oxide

A new high-entropy spinel oxide, namely (Co,Zn,Fe,Mn,Ni)3O4, has been prepared by solution combustion synthesis method at different temperatures from 350 C to 750 C. The structure and magnetic property are compared with those of (Co,Cr,Fe,Mn,Ni)3O4, (Zn,Cr,Fe,Mn,Ni)3O4 and (Co,Cr,Fe,Mn,Zn)3O4. The X-ray diffraction demonstrates all samples are single-phase spinel structure. Their lattice parameters decrease with reduction in the ionic radius of Cr3+, Zn2+, Co2+ and Ni2+. The energy dispersive spectrum spectra and mapping show a random, uniform and equiatomic distribution of all the elements. Further, magnetic moment and crystallite size can be controlled through the components of high-entropy oxides, to achieve tailorable magnetic property.