Influence of Co2+ on the structural and magnetic properties of substituted magnetites obtained by the coprecipitation method
| dc.citation.journalTitle | Hyperfine Interactions | |
| dc.contributor.author | Velásquez, A.A. | |
| dc.contributor.author | Urquijo, J.P. | |
| dc.contributor.department | Universidad EAFIT. Departamento de Ciencias Básicas | |
| dc.contributor.researchgroup | Electromagnetismo Aplicado (Gema) | spa |
| dc.date.accessioned | 2021-03-23T21:39:31Z | |
| dc.date.available | 2021-03-23T21:39:31Z | |
| dc.date.issued | 2015-01-01 | |
| dc.description.abstract | In 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.identifier | https://eafit.fundanetsuite.com/Publicaciones/ProdCientif/PublicacionFrw.aspx?id=1702 | |
| dc.identifier.doi | 10.1007/s10751-015-1122-3 | |
| dc.identifier.issn | 03043843 | spa |
| dc.identifier.issn | 15729540 | spa |
| dc.identifier.other | SCOPUS;2-s2.0-84933180053 | |
| dc.identifier.uri | http://hdl.handle.net/10784/27154 | |
| dc.language.iso | eng | eng |
| dc.publisher | SPRINGER | |
| dc.relation.uri | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84933180053&doi=10.1007%2fs10751-015-1122-3&partnerID=40&md5=4f5a325e5c784d02ec05c5d8c383f6ba | |
| dc.rights | https://v2.sherpa.ac.uk/id/publication/issn/0304-3843 | |
| dc.source | Hyperfine Interactions | |
| dc.subject.keyword | Divalent cobalt | eng |
| dc.subject.keyword | Mössbauer spectroscopy | eng |
| dc.subject.keyword | Substituted magnetites | eng |
| dc.title | Influence of Co2+ on the structural and magnetic properties of substituted magnetites obtained by the coprecipitation method | eng |
| dc.type | article | eng |
| dc.type | info:eu-repo/semantics/article | eng |
| dc.type | info:eu-repo/semantics/publishedVersion | eng |
| dc.type | publishedVersion | eng |
| dc.type.local | Artículo | spa |
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