Structure, magnetism and magnetic induction heating of NixCo(1-x)Fe2O4 nanoparticles

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dc.creatorPatricia Mariana Alves Caetano
dc.creatorAdriana Silva de Albuquerque
dc.creatorLuis Eugenio Fernandez Outon
dc.creatorWaldemar Augusto de Almeida Macedo
dc.creatorJose Domingos Ardisson
dc.date.accessioned2025-02-23T14:32:49Z
dc.date.accessioned2025-09-08T23:26:15Z
dc.date.available2025-02-23T14:32:49Z
dc.date.issued2018
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Gerais
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
dc.identifier.doihttps://doi.org/10.1016/j.jallcom.2018.05.124
dc.identifier.issn1873-4669
dc.identifier.urihttps://hdl.handle.net/1843/80324
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofJournal of Alloys and Compounds
dc.rightsAcesso Restrito
dc.subjectNanopartículas
dc.subjectIndução magnética
dc.subject.otherFerrite nanoparticles
dc.subject.otherMagnetic induction heating
dc.subject.otherSpecific absorption rate
dc.titleStructure, magnetism and magnetic induction heating of NixCo(1-x)Fe2O4 nanoparticles
dc.typeArtigo de periódico
local.citation.epage255
local.citation.spage247
local.citation.volume758
local.description.resumoNiFe2O4 and CoFe2O4 nanoparticles present different efficiencies as magnetic heating agents due to their respectively soft and hard magnetic properties. The substitution of Ni by Co to form mixed NixCo(1-x)Fe2O4 nanoparticles is employed, along with thermal treatment, to tailor their heating efficiency by modification of their structural and magnetic properties. For that purpose, nanostructured NixCo(1-x)Fe2O4 (with x = 0.00, 0.25, 0.50, 0.75 and 1.00) were synthesized by coprecipitation and annealed at 400, 700 and 1000 °C. The substitution of Ni by Co allows obtaining particles with progressively lower saturation magnetization and magnetic anisotropy. Heat treatment allows modifying the saturation magnetization and coercivity differently, by enhancing hyperfine magnetic fields and increasing the particle size beyond the transition from monodomain to multidomain behaviour, respectively. Samples annealed at 700 °C exhibit the largest coercivity and anisotropy values, whilst magnetization values increase progressively with the annealing temperature. The AC induced heating efficiency of NixCo(1-x)Fe2O4 increases with Ni content due to increased minor hysteresis losses. For a given time of exposure and concentration, selection of the nanoparticle size and Ni content allows to obtain different efficiencies, which can be selected according to the heating applications involved.
local.identifier.orcidhttps://orcid.org/0000-0003-3264-337X
local.identifier.orcidhttps://orcid.org/0000-0001-5451-9965
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE FÍSICA
local.publisher.initialsUFMG
local.url.externahttps://www.sciencedirect.com/science/article/pii/S0925838818318218?via%3Dihub

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