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.

Automated summary

A new high-entropy spinel oxide, (Co,Zn,Fe,Mn,Ni)3O4, was prepared by solution combustion synthesis method, and its structure and magnetic properties were compared with other similar oxides. It was found that the magnetic properties can be tailored by controlling the components of high-entropy oxides.