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Title: The effect of Sr2+ on the structure and magnetic properties of nanocrystalline cobalt ferrite
Authors: Araújo, José Humberto de
Lima, Aldenir Cavalcanti
Peres, Ana Paula Da Silva
Torres, Marco Antônio Morales
Medeiros, Susana Nóbrega de
Soares, João Maria
Melo, Daniel Macedo A.
Carriço, Artur da Silva
Keywords: Combustion method;Nanoparticles;CoFe2O4;Mössbauer spectroscopy;Magnetic properties
Issue Date: 15-Apr-2015
Publisher: Elsevier
Citation: RODRIGUES, A.P.G.; GOMES, D.K.S.; ARAÚJO, J.H. ; MELO, D.M.A.; OLIVEIRA, N.A.S.; BRAGA, R.M. . Nanoferrites of nickel doped with cobalt: Influence of Co2+ on the structural and magnetic properties. Journal of Magnetism and Magnetic Materials, v. 374, p. 748-754, 2015. Disponível em:! Acesso em: 25 jun. 2020.
Portuguese Abstract: We report the effect of Sr2+ on the structure, morphology and magnetic properties of CoFe2O4 synthesized by microwave-assisted combustion method. Results from X-ray diffraction and Mössbauer spectroscopy at 298 K suggest the formation of a mixed spinel Sr2+ substituted CoFe2O4. However, secondary phases like CoO, SrCO3 and SrFeO2.96 were also observed. A decrease in the lattice parameter and particle size were observed with the addition of Sr2+. The crystallite size of ferrite phase ranged from 53 to 62 nm. Magnetic studies showed a gradual decrease in the saturation magnetization and remanence with the increase of Sr2+ content, and an increasing value of the coercive field
ISSN: 0167-577X
Appears in Collections:CCET - DFTE - Artigos publicados em periódicos

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