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Publikācija: Effect of Antisite Defects on the Magnetic Properties of ZnFe2O4

Publication Type Scientific article indexed in SCOPUS or WOS database
Funding for basic activity Unknown
Defending: ,
Publication language English (en)
Title in original language Effect of Antisite Defects on the Magnetic Properties of ZnFe2O4
Field of research 2. Engineering and technology
Sub-field of research 2.5 Materials engineering
Authors Andris Šutka
Rainer Pärna
Māris Zamovskis
Vambola Kisand
Gundars Mežinskis
Jānis Kleperis
Mihael Maiorov
Dmitrijs Jakovļevs
Keywords magnetic properties, nanoparticles, sol–gel autocombustion, zinc ferrite
Abstract Magnetic zinc ferrite (ZnFe2O4) nanopowders were synthesized using the sol–gel autocombustion method. X-ray diffraction (XRD) and scanning electron microscopy (SEM) measurements demonstrated that thermal decomposition of the 1-mm-thick xerogel layers in air formed monophasic spinel ferrite nanopowders with a particle size less than 30 nm. X-ray photoelectron spectroscopy (XPS) showed that the obtained reaction product contained antisite defects, with zinc ions occurring at the octahedral sites of the spinel structure. The concentration of antisite defects or inversion degree decreased when the relatively low annealing temperature was increased from 150 to 500 8C. Overall, the obtained ZnFe2O4, which is usually antiferromagnetic (exhibits no magnetic moment), demonstrated high saturation magnetization (60.7 emu g1), and coercive force (56 Oe). This was due to the presence of the antisite defects in the structure.
DOI: 10.1002/pssa.201329039
Hyperlink: http://onlinelibrary.wiley.com/doi/10.1002/pssa.201329039/abstract 
Reference Šutka, A., Pärna, R., Zamovskis, M., Kisand, V., Mežinskis, G., Kleperis, J., Maiorov, M., Jakovļevs, D. Effect of Antisite Defects on the Magnetic Properties of ZnFe2O4. Physica Status Solidi A, 2013, Vol.210, Iss.9, pp.1892-1897. e-ISSN 1862-6319. Available from: doi:10.1002/pssa.201329039
Additional information Citation count:
ID 19734