Electronic structure studies of chemically synthesized MgFe2O4 nanoparticles

Title
Electronic structure studies of chemically synthesized MgFe2O4 nanoparticles
Authors
Jitendra Pal Singh원성옥임원철Ik-Jae Lee채근화
Keywords
Nanoparticles; Electronic structure; Density of states; Crystallization
Issue Date
2016-01
Publisher
Journal of molecular structure
Citation
VOL 1108, 444-450
Abstract
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.
URI
http://pubs.kist.re.kr/handle/201004/58439
ISSN
00222860
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KIST Publication > Article
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