Influence of Co2+ on the structural and magnetic properties of substituted magnetites obtained by the coprecipitation method

dc.citation.journalTitleHyperfine Interactions
dc.contributor.authorVelásquez, A.A.
dc.contributor.authorUrquijo, J.P.
dc.contributor.departmentUniversidad EAFIT. Departamento de Ciencias Básicas
dc.contributor.researchgroupElectromagnetismo Aplicado (Gema)spa
dc.date.accessioned2021-03-23T21:39:31Z
dc.date.available2021-03-23T21:39:31Z
dc.date.issued2015-01-01
dc.description.abstractIn this paper we report the effect of divalent cobalt on the structural and magnetic properties of substituted magnetites, Fe 3-xCo xO4, with ?=Co 2+/Fe = 0, 5, 10, 15, 20 and 30 % wt, synthesized by the coprecipitation method. The samples were characterized by Atomic Absorption Spectroscopy, X-ray Diffraction, room temperature Mössbauer Spectroscopy and Vibrating Sample Magnetometry. The effect of Co 2+ was found to depend strongly of the concentration employed in the synthesis process. For ?=15 % the Co 2+ promotes the formation of particles more crystalline and with higher saturation magnetization, remanence and coercivity than those obtained in absence of this cation. A sequential increasing of the lattice parameter is observed, as well as a reduction in the hyperfine magnetic field of the Fe 2.5+sub spectrum, while the hyperfine magnetic field of the Fe 3+sub spectrum keeps almost constant. For ?=20 % and 30 % the crystallinity of the samples decreases, particle size distribution effects are evidenced and the saturation magnetization decreases drastically. The results suggest that for low Co 2+ contents the substitution of Fe 3+by Co 2+ at octahedral sites of the inverse spinel system is the dominant effect, while for the highest concentrations used the substitution of Fe 2+ by Co 2+ and the increasing of the particle size distribution are the dominant effects. © 2015, Springer International Publishing Switzerland.eng
dc.identifierhttps://eafit.fundanetsuite.com/Publicaciones/ProdCientif/PublicacionFrw.aspx?id=1702
dc.identifier.doi10.1007/s10751-015-1122-3
dc.identifier.issn03043843spa
dc.identifier.issn15729540spa
dc.identifier.otherSCOPUS;2-s2.0-84933180053
dc.identifier.urihttp://hdl.handle.net/10784/27154
dc.language.isoengeng
dc.publisherSPRINGER
dc.relation.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84933180053&doi=10.1007%2fs10751-015-1122-3&partnerID=40&md5=4f5a325e5c784d02ec05c5d8c383f6ba
dc.rightshttps://v2.sherpa.ac.uk/id/publication/issn/0304-3843
dc.sourceHyperfine Interactions
dc.subject.keywordDivalent cobalteng
dc.subject.keywordMössbauer spectroscopyeng
dc.subject.keywordSubstituted magnetiteseng
dc.titleInfluence of Co2+ on the structural and magnetic properties of substituted magnetites obtained by the coprecipitation methodeng
dc.typearticleeng
dc.typeinfo:eu-repo/semantics/articleeng
dc.typeinfo:eu-repo/semantics/publishedVersioneng
dc.typepublishedVersioneng
dc.type.localArtículospa

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