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dc.contributor.authorMartín-González, Marisol-
dc.contributor.authorGarcía, Miguel Ángel Pérez-
dc.contributor.authorLorite, Israel-
dc.contributor.authorCosta Krämer, José Luis-
dc.contributor.authorRubio Marcos, Fernando-
dc.contributor.authorCarmona, N.-
dc.contributor.authorFernández Lozano, José Francisco-
dc.date.accessioned2010-06-02T09:50:14Z-
dc.date.available2010-06-02T09:50:14Z-
dc.date.issued2010-01-12-
dc.identifier.citationJournal of The Electrochemical Society 157(3): E31-E35 (2010)en_US
dc.identifier.issn0013-4651-
dc.identifier.urihttp://hdl.handle.net/10261/24950-
dc.description.abstractSolid oxide interfaces are at the forefront of solid-state science and materials research, exhibiting very appealing properties for new devices. This work describes the appearance of unexpected magnetic phenomena related to solid-state redox reaction, which might be the origin of the recently discovered magnetic signals in oxide multilayers and ceramic mixtures. The magnetic signal arises only when dissimilar oxide nanoparticles are simply mixed at room temperature, and it is not observed when nanoparticles are of the same chemical composition. Therefore, the phenomenon is ascribed to an interfacial solid-state reaction. Raman and X-ray absorption spectroscopies, scanning electron microscopy, and vibrating sample magnetometer have allowed us to identify the origin of the ferrimagnetic response. It is due to an electrochemical surface reduction of Co3+ in octahedral coordination to Co2+. So, Co2+(oct)–O–Co 2+(tetra)interactions are produced. The reaction is driven by the different surface basicity of the oxides and has allowed obtaining different degrees of reaction, and concomitantly a proportionally strong magnetic response, when Co3O4 nanoparticles are mixed with SiO2, Al2O3, TiO2, and ZnO (from a larger to a smaller ferrimagnetic response). Also, a mechanism by which Co3O4 nanoparticles become ferrimagnetic is proposed.en_US
dc.description.sponsorshipThis work was supported by the CSIC 2006-50F0122, CSIC 2007-50I015, FIS-2008-06249, MAT2008-06330, and CICYT MAT2007-66845-102-01. M.S.M.G. also acknowledges the ERC program for her starting grant.en_US
dc.format.extent617232 bytes-
dc.format.mimetypeapplication/pdf-
dc.language.isoengen_US
dc.publisherElectrochemical Societyen_US
dc.rightsopenAccessen_US
dc.subjectMagnetic phenomenaen_US
dc.subjectNanoparticlesen_US
dc.subjectSolid-state redox reactionen_US
dc.titleA Solid-State Electrochemical Reaction as the Origin of Magnetism at Oxide Nanoparticle Interfacesen_US
dc.typeartículoen_US
dc.identifier.doi10.1149/1.3272638-
dc.description.peerreviewedPeer revieweden_US
dc.relation.publisherversionhttp://dx.doi.org/10.1149/1.3272638en_US
dc.identifier.e-issn1945-7111-
dc.contributor.funderConsejo Superior de Investigaciones Científicas (España)-
dc.contributor.funderComisión Interministerial de Ciencia y Tecnología, CICYT (España)-
dc.contributor.funderEuropean Commission-
dc.contributor.funderMinisterio de Economía y Competitividad (España)-
dc.relation.csic-
dc.identifier.funderhttp://dx.doi.org/10.13039/501100003339es_ES
dc.identifier.funderhttp://dx.doi.org/10.13039/501100007273es_ES
dc.identifier.funderhttp://dx.doi.org/10.13039/501100000780es_ES
dc.identifier.funderhttp://dx.doi.org/10.13039/501100003329es_ES
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