| Abstract Scope |
High-entropy spinel oxides (HESOs) are emerging as promising functional ceramics due to their high configurational entropy and tunable properties. We report a systematic study of AB₂O₄-type HESOs, A[Cr₀.₂Fe₀.₂Mn₀.₂Ga₀.₂Al₀.₂]2O₄ with A = [Ni₀.₂Mg₀.₂Co₀.₂Cu₀.₂Zn₀.₂], focusing on their structural, vibrational, microstructural, and magnetic properties. X-ray and neutron diffraction confirm the formation of a single-phase cubic spinel with significant cationic disorder, enhancing structural stability. Raman spectroscopy reveals mode shifts and broadening, indicating local structural distortions. SEM shows uniform microstructure and morphology. Magnetic studies demonstrate A-site antiferromagnetic and B-site ferrimagnetic interactions, driven by 3d metal cation exchange through oxygen anions. These results highlight the complex interplay between crystal chemistry and magnetic ordering in HESOs, providing insights into their structure–property correlations. This work establishes the studied series as promising candidates for advanced magnetic and electronic applications. |