Please use this identifier to cite or link to this item: http://www.repositorio.cdtn.br:8080/jspui/handle/123456789/522
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dc.contributor.authorAlbuquerque, Adriana Silva de
dc.contributor.authorArdisson, José Domingos
dc.contributor.authorMacedo, Waldemar Augusto de Almeida
dc.contributor.authorLopez, J.L.
dc.contributor.authorPaniago, R.
dc.contributor.authorPersiano, A.I.C.
dc.date.accessioned2016-08-29T18:47:36Z-
dc.date.available15-2-2011
dc.date.available2016-08-29T18:47:36Z-
dc.date.issued2001
dc.identifier.issnISSN 0304-8853
dc.identifier.urihttp://www.repositorio.cdtn.br:8080/jspui/handle/123456789/522-
dc.description.abstractThe structural and magnetic properties of NiFe2 O-4 ultrafine powders synthesized by coprecipitation, a nonconventional method of preparation, were investigated. The samples were obtained by annealing at relatively low temperatures (300-600 degreesC) and characterized by X-ray diffraction, Moessbauer spectroscopy, and vibrating sample magnetometry. The average particle diameter ranges from 4 to 15 nm, as determined by X-ray diffraction. All nanometric powder samples presented strong superparamagnetic relaxation at room temperature and reduced magnetic hyperfine fields at-193 degreesC. Magnetometry measurements indicated different magnetic behavior related with crystallinity of samples, coercivity as high as 168 Oe at 27degreesC, value that is nearly two times higher than coercivity of bulk Ni-ferrite.
dc.language.isoInglês
dc.rightsL
dc.subjectFerrites
dc.subjectMoessbauer effect
dc.subjectmagnetic properties
dc.titleStructure and magnetic properties of nanostructured Ni-ferrite
dc.typeArtigo Periódico
dc.creator.affiliationCentro de Desenvolvimento da Tecnologia Nuclear/CDTN,Belo Horizonte, MG, Brasil
dc.creator.affiliationCentro de Desenvolvimento da Tecnologia Nuclear/CDTN, Belo Horizonte, MG, Brasil
dc.creator.affiliationCentro de Desenvolvimento da Tecnologia Nucler/CDTN, Belo Horizonte/MG, Brasil
dc.creator.affiliationUniversidade Fedral de Minas Gerais/UFMG, Belo Horizonte, MG, Brasil
dc.creator.affiliationUniversidade Federal de Minas Gerais/UFMG, Belo Horizonte, MG, Brasil
dc.creator.affiliationUniversidade Federal de Minas Gerais/UFMG,Belo Horizonte, MG, Brasil
dc.identifier.fasciculopt.2 Sp.Iss
dc.identifier.vol226
dc.identifier.extentp. 1379-1381
dc.title.journalJournal of Magnetism and Magnetic Materials Amsterdam
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