Preparation and Characterization of FeAg Granular Alloys

dc.contributor.authorAraújo, José Humberto de
dc.contributor.authorSoares, J. M.
dc.contributor.authorCabral, F. A. O.
dc.contributor.authorCosta, J. A. P. da
dc.contributor.authorSasaki, M.
dc.date.accessioned2020-05-14T14:36:59Z
dc.date.available2020-05-14T14:36:59Z
dc.date.issued2004
dc.description.abstractFe10Ag90 granular alloys have been fabricated, using a sol-gel method, for a range of nitric acid concentrations in the start solution. The samples have been characterized by X-ray diffraction and magnetization measurements. The average Fe particle sizes derived from X-ray diffraction are in the range 24-29 nm, indicating a large variation. The coercivity obtained from the hysteresis curve is two orders of magnitude larger that of pure iron in all the samples. Moreover, the hysteresis curves do not saturate, even in fields of up to 1 T. These observations indicate that the samples contain both superparamagnetic and blocked particles. A comparison between the coercive field and the average particle diameter, determined by the Sherrer's formula, is displayed in all acid concentrations.pt_BR
dc.description.resumoFe10Ag90 granular alloys have been fabricated, using a sol-gel method, for a range of nitric acid concentrations in the start solution. The samples have been characterized by X-ray diffraction and magnetization measurements. The average Fe particle sizes derived from X-ray diffraction are in the range 24-29 nm, indicating a large variation. The coercivity obtained from the hysteresis curve is two orders of magnitude larger that of pure iron in all the samples. Moreover, the hysteresis curves do not saturate, even in fields of up to 1 T. These observations indicate that the samples contain both superparamagnetic and blocked particles. A comparison between the coercive field and the average particle diameter, determined by the Sherrer's formula, is displayed in all acid concentrations.pt_BR
dc.identifier.citationARAUJO, Jose Humberto de et al. Preparation and Characterization of FeAg Granular Alloys. Materials Research, Brazil, v. 7, n.3, p. 513-516, 2004. Disponivel em: https://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392004000300022&lng=en&tlng=en. Acesso em: 15 maio 2020. https://doi.org/10.1590/S1516-14392004000300022.pt_BR
dc.identifier.doi10.1590/S1516-14392004000300022
dc.identifier.issn1516-1439 (online), 1980-5373 (print)
dc.identifier.urihttps://repositorio.ufrn.br/jspui/handle/123456789/28979
dc.languageenpt_BR
dc.publisherMaterials Researchpt_BR
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Brazil*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/br/*
dc.subjectSol-gelpt_BR
dc.subjectGranular alloypt_BR
dc.subjectFerromagnetismpt_BR
dc.titlePreparation and Characterization of FeAg Granular Alloyspt_BR
dc.typearticlept_BR

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