摘要：Nano particles of Co Mg Cr Fe O were synthesized by sol-gel auto- 0.5 0.5 x 2-x 4 combustion method at relative low annealing temperature. The obtained samples were characterized by X-ray diffraction (XRD) technique. Cr3+ ions induced the change in lattice constant and other structural parameters of Co Mg CrxFe O . Hopping 0.5 0.5 2-x 4 lengths of tetrahedral A-site (LA) and octahedral B-site (LB) found to decrease with increases Cr3+ ions. The allied parameters such as tetrahedral bond (dAX), octahedral bond (dBX), tetra edge (dAXE) and octahedral edge (dBXE) shows decreasing behaviour with increasing Cr3+ ions.
