Please use this identifier to cite or link to this item: https://repositorio.ufrn.br/jspui/handle/123456789/29390
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dc.contributor.authorAraújo, José Humberto de-
dc.contributor.authorSilva, José Eves Mendes-
dc.contributor.authorNasar, Ricardo Silveira-
dc.contributor.authorNasar, Marinalva Cerqueira-
dc.contributor.authorFirme, Caio Lima-
dc.date.accessioned2020-06-30T17:49:31Z-
dc.date.available2020-06-30T17:49:31Z-
dc.date.issued2015-11-15-
dc.identifier.citationSILVA, J.E. M.; NASAR, R. S. ; NASAR, M. C. ; FIRME, C. L.; Araújo, J. H.. Correlation between coercive field and radiation attenuation in Ni and Mg ferrite doped with Mn and Co. Journal of Magnetism and Magnetic Materials, v. 394, p. 274-279, 2015. Disponível em: https://www.sciencedirect.com/science/article/pii/S0304885315302304?via%3Dihub#! Acesso em: 23 jun. 2020. https://doi.org/10.1016/j.jmmm.2015.06.014pt_BR
dc.identifier.issn0304-8853-
dc.identifier.urihttps://repositorio.ufrn.br/jspui/handle/123456789/29390-
dc.description.abstractIpt_BR
dc.languageenpt_BR
dc.publisherElsevierpt_BR
dc.rightsAttribution 3.0 Brazil*
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/br/*
dc.subjectSpinel ferritpt_BR
dc.subjectCitrate precursorspt_BR
dc.subjectMagnetic materialpt_BR
dc.subjectRadar absorbing materialpt_BR
dc.subjectFerrimagnetic materialspt_BR
dc.subjectMagnetic coercivitypt_BR
dc.subjectreflectivitypt_BR
dc.titleCorrelation between coercive field and radiation attenuation in Ni and Mg ferrite doped with Mn and Copt_BR
dc.typearticlept_BR
dc.identifier.doi10.1016/j.jmmm.2015.06.014-
dc.description.resumoIt was investigated NiMg0.1MxFe2O4 ferrite where M stands for Mn, Co or simultaneously Mn and Co dopants. The concentration of M is 0.1 and it was divided by two in the sample with addition of Mn and Co. It was used the method of citrate precursors with 1100 °C calcination. The materials were characterized by X-ray diffractometer (XRD), scanning electron microscopy (SEM), vibrating sample magnetometer (VSM) and reflectivity measures by waveguide method. The X-ray diffraction measures, with Rietveld refinement, present average crystallite sizes between 0.576 and 0.626 µm. The SEM analysis shows clustered particles smaller than 1 µm at 1100 °C, in agreement with Rietveld refinement. The compositions with Mn reach magnetization between 42.09 and 53.20 Am2/kg, which does not generate high microwave absorption. The 0.1 Co addition reached greater coercivity (2.96×10−2 T), with up to 84% reflectivity at 10.17 GHz frequency. The Co material has high magnetocrystalline anisotropy, which is associated with the increase of coercive field, Hc. The higher coercivity optimizes the reflectivity resultspt_BR
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