A comprehensive study of Co1−xNixFe2O4 nanoparticles fabricated via three different synthetic methods
Nenhuma Miniatura disponível
Data
2019
Título da Revista
ISSN da Revista
Título de Volume
Editor
Resumo
Wereport on three different synthetic methods for producing Co1−xNixFe2O4 nanoparticles (x=0.0,
0.4, and 1.0): combustion (C), hydrothermal (HT), and forced hydrolysis (FH). Theoretical fittings of
the ferromagnetic resonance (FMR) lines were achieved by considering a proposed four-fold
symmetry model for randomly dispersed magnetic nanoparticles (NPs). The average grain size (D),
between 10 and 80 nm, and magnetic properties are found to depend strongly on both the
selectedsynthesis route and stoichiometry (x). Interestingly, while the HT- and FH-methods provide
NPs with no systematic dependence of coercive field and remanence, upon x or D, the C-method
showedmonotonic dependence. The magnetocrystalline anisotropy field (Ha), extracted from
simulating theFMRspectra, systematically reduces with increasing x, regardless the synthetic route
used. Worth mentioning that the largest (smallest) variation inHa is observed for the C-method (HTmethod)
equals toΔHa=−3853 Oe (ΔHa=−1676 Oe).
Descrição
Palavras-chave
Nickel-cobalt ferrite, Physical properties, Nanoparticle, Combustion, Hydrothermal, Hydrolysis, Ferromagnetic resonance spectrum simulation
Citação
PESSOA, M. S.; MOSCON, P. S.; MELO, R. S.; FRANCO JR, A.; MORAIS, P. C. A comprehensive study of Co 1−x Ni x Fe 2 O 4 nanoparticles fabricated via three different synthetic methods. Materials Research Express, Bristol, v. 6, e125068, 2019. DOI: 10.1088/2053-1591/ab597c. Disponível em: https://iopscience.iop.org/article/10.1088/2053-1591/ab597c. Acesso em: 6 abr. 2023.