Nanoferrites of nickel doped with cobalt: influence of Co2+ on the structural and magnetic properties

Nanoferrites of nickel substituted with cobalt of composition Ni1−xCoxFe2O4 (0≤x≤0.75), were synthesized by combustion reaction assisted in microwaves. The influence of the substitution of Ni2+ by Co2+ content and the concentration of Co2+ in the structural and magnetic properties was investigated....

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Principais autores:	Araújo, José Humberto de, Rodrigues, A. P.G., Gomes, Danielle Karinne Souza, Melo, Daniel Macedo A., Oliveira, N.A.S., Braga, Renata M.
Formato:	article
Idioma:	English
Publicado em:	Elsevier
Assuntos:	Ferrite Spinel Nickel Cobalt Combustion Magnetic propertie
Endereço do item:	https://repositorio.ufrn.br/jspui/handle/123456789/29400
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spelling	ri-123456789-294002020-07-05T07:47:23Z Nanoferrites of nickel doped with cobalt: influence of Co2+ on the structural and magnetic properties Araújo, José Humberto de Rodrigues, A. P.G. Gomes, Danielle Karinne Souza Melo, Daniel Macedo A. Oliveira, N.A.S. Braga, Renata M. Ferrite Spinel Nickel Cobalt Combustion Magnetic propertie Nanoferrites of nickel substituted with cobalt of composition Ni1−xCoxFe2O4 (0≤x≤0.75), were synthesized by combustion reaction assisted in microwaves. The influence of the substitution of Ni2+ by Co2+ content and the concentration of Co2+ in the structural and magnetic properties was investigated. The powders were prepared by combustion according to the concept of chemical propellants and heated in a microwave oven with a power of 7000 kW. The synthesized powders were characterized by absorption spectroscopy in the infrared region (FTIR), X-ray diffraction (XRD) together with Rietveld refinement, surface area (BET) method, scanning electron microscopy (MEV) and magnetic measurements (MAV). The results indicated that it was possible to obtain nickel ferrite doped with cobalt in all compositions and that an increase of cobalt concentration caused an increase in particle size (9.78–21.63 nm), a reduction in surface area, and reduction in magnetic concentrations greater than 50% 2020-07-02T19:50:48Z 2020-07-02T19:50:48Z 2015-01-15 article 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: https://www.sciencedirect.com/science/article/pii/S0304885314008671?via%3Dihub#! Acesso em: 25 jun 2020. https://doi.org/10.1016/j.jmmm.2014.09.045 0304-8853 https://repositorio.ufrn.br/jspui/handle/123456789/29400 10.1016/j.jmmm.2014.09.045 en Attribution 3.0 Brazil http://creativecommons.org/licenses/by/3.0/br/ application/pdf Elsevier
institution	Repositório Institucional
collection	RI - UFRN
language	English
topic	Ferrite Spinel Nickel Cobalt Combustion Magnetic propertie
spellingShingle	Ferrite Spinel Nickel Cobalt Combustion Magnetic propertie Araújo, José Humberto de Rodrigues, A. P.G. Gomes, Danielle Karinne Souza Melo, Daniel Macedo A. Oliveira, N.A.S. Braga, Renata M. Nanoferrites of nickel doped with cobalt: influence of Co2+ on the structural and magnetic properties
description	Nanoferrites of nickel substituted with cobalt of composition Ni1−xCoxFe2O4 (0≤x≤0.75), were synthesized by combustion reaction assisted in microwaves. The influence of the substitution of Ni2+ by Co2+ content and the concentration of Co2+ in the structural and magnetic properties was investigated. The powders were prepared by combustion according to the concept of chemical propellants and heated in a microwave oven with a power of 7000 kW. The synthesized powders were characterized by absorption spectroscopy in the infrared region (FTIR), X-ray diffraction (XRD) together with Rietveld refinement, surface area (BET) method, scanning electron microscopy (MEV) and magnetic measurements (MAV). The results indicated that it was possible to obtain nickel ferrite doped with cobalt in all compositions and that an increase of cobalt concentration caused an increase in particle size (9.78–21.63 nm), a reduction in surface area, and reduction in magnetic concentrations greater than 50%
format	article
author	Araújo, José Humberto de Rodrigues, A. P.G. Gomes, Danielle Karinne Souza Melo, Daniel Macedo A. Oliveira, N.A.S. Braga, Renata M.
author_facet	Araújo, José Humberto de Rodrigues, A. P.G. Gomes, Danielle Karinne Souza Melo, Daniel Macedo A. Oliveira, N.A.S. Braga, Renata M.
author_sort	Araújo, José Humberto de
title	Nanoferrites of nickel doped with cobalt: influence of Co2+ on the structural and magnetic properties
title_short	Nanoferrites of nickel doped with cobalt: influence of Co2+ on the structural and magnetic properties
title_full	Nanoferrites of nickel doped with cobalt: influence of Co2+ on the structural and magnetic properties
title_fullStr	Nanoferrites of nickel doped with cobalt: influence of Co2+ on the structural and magnetic properties
title_full_unstemmed	Nanoferrites of nickel doped with cobalt: influence of Co2+ on the structural and magnetic properties
title_sort	nanoferrites of nickel doped with cobalt: influence of co2+ on the structural and magnetic properties
publisher	Elsevier
publishDate	2020
url	https://repositorio.ufrn.br/jspui/handle/123456789/29400
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Nanoferrites of nickel doped with cobalt: influence of Co2+ on the structural and magnetic properties

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