Electronic structure studies of chemically synthesized MgFe2O4
- Electronic structure studies of chemically synthesized MgFe2O4
- Jitendra Pal Singh; 원성옥; 임원철; Ik-Jae Lee; 채근화
- Nanoparticles; Electronic structure; Density of states; Crystallization
- Issue Date
- Journal of molecular structure
- VOL 1108, 444-450
- For present work, magnesium ferrite nanoparticles were synthesized using nitrates of metal ions and citric acid. Crystallite size of these nanoparticles varies from 2.1 ± 0.1 to 62 ± 10 nm as annealing temperatures increases from 300 to 1200 °C. Mg K-edge near-edge X-ray absorption fine-structure spectra reflect the presence of Mg2+ ions in both tetrahedral (A-site) and octahedral (B-site) environment for nanoparticles synthesized at all temperatures. The integral area of spectral features of O K-edge spectra is associated with the change of unoccupied O p-projected density of states. Fe L-edge spectra envisage the presence of Fe3+ state in these nanoparticles. Observed changes in the electronic structure of these nanoparticles are discussed on the basis of cation migration from A-site to B-site, degree of crystallization, and unsaturated bonds at crystallite surface. Fe–O distances at A-site and B-site changes with annealing temperature.
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