Improving the optical properties of magnesium spinel chromites through Ni and Cu substitutions for optoelectronic applications.

In this study, we investigated the optoelectronic performance of magnesium spinel chromites with nickel (Ni) and copper (Cu) substitutions. Using the sol-gel method, we synthesized two spinel chromites: MgNiCrO (MNCO) and MgCuCrO (MCCO). We extensively characterized these samples to analyze their thermal, structural, elastic, and optical properties.

Microstructural analysis, magnetic properties, magnetocaloric effect, and critical behaviors of NiCdCuFeO ferrites prepared using the sol-gel method under different sintering temperatures.

This work focuses on the microstructural analysis, magnetic properties, magnetocaloric effect, and critical exponents of NiCdCuFeO ferrites. These samples, denoted as S1000 and S1200, were prepared using the sol-gel method and sintered separately at 1000 °C and 1200 °C, respectively. XRD patterns confirmed the formation of cubic spinel structures and the Rietveld method was used to estimate the different structural parameters.