Date of this Version
Olds, Camden. Magnetic Properties of Polycrystalline Spinel Oxides from Solid State Reaction. Undergraduate Honors Thesis. University of Nebraska-Lincoln. 2023.
Spinel crystal materials of nickel, cobalt, and iron oxides have seen abundant research for their strong conductivity, ferromagnetic and ferroelectric properties, and their catalytic uses. These can be synthesized by a number of means. This project explores the use of the solid state synthesis method, which benefits from simplicity, of this family of materials, looking for interesting phase shift lines in the triangle between of varying compositions of these three metals.
Nickel cobaltite and other related spinels were synthesized from two different solid state approaches and characterized using XRD and SQUID magnetometry. The range 0.5-0.6 of molar ratios of nickel to cobalt does not appear to contain any new interesting spinel structures, and varying the ratio just this small amount appears to hamper the synthesis of nickel cobalt oxide on its own.