The effects of Ni2+ doping on the crystalline lattice and corresponding magnetic properties of Mg1−xNixFe2O4 nanocrystals, synthesized by a microwave combustion, are systematically studied. Highly crystalline nanoparticles with average size of 20–30 nm and stoichiometric chemical compositions are indicated by results of transmission electron microscopy (TEM) and inductively coupled plasma mass spectrometry (ICP-MS), respectively. The structural properties including lattice parameter, cationic radii, cationic distribution, bond lengths and angles have been estimated based on Rietveld analysis of the x-ray diffraction (XRD) patterns. Mostly inverse spinel structure in MgFe2O4 with an observed nonmonotonic increase of the inversion factor by Ni substitution and almost complete inversion for × ≳ 0.5 indicate competitive site preferences of the cations. The synthesized nanocrystals exhibit soft single-domain
Research Abstract
Research Date
Research Department
Research Journal
Materials Science & Engineering B
Research Member
Research Publisher
Elsevier
Research Year
2021
Research Pages
115494