Polymer Composite Group, Directorate of Science, PINSTECH, P.O. Nilore, Islamabad, Pakistan; Department of Chemistry, University of Education, Attock Campus, Pakistan
Lubna Rasheed
Department of Chemistry, Rawalpindi Women University, Rawalpindi, Pakistan
M. Atiq Ur Rehman
Department of Materials Science and Engineering, Institute of Space Technology Islamabad, 44000, Pakistan
Re-arrangement of cationic distribution in partially inverse spinel NiAl2O4 by using chemical pressure perturbation is studied. Structural, impedance and magnetic analysis suggest presence of regions/domains inside the grain/bulk with same lattice arrangement but varying in cationic oxidation state. Perturbing the cationic distribution in the grain via low concentrations of ambivalence substituent rearranges the cationic distribution across these domains within the partially inverse spinel lattice without disturbing the crystal structure. A comprehensive explanation on the origin & tunability of cationic distribution within the partially-inverse lattice is proposed.
