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dc.creatorSchrade, Mattiases
dc.creatorMasó, Nahumes
dc.creatorPerejón Pazo, Antonioes
dc.creatorPérez Maqueda, Luis Allanes
dc.creatorWest, Anthony R.es
dc.date.accessioned2018-09-20T14:01:56Z
dc.date.available2018-09-20T14:01:56Z
dc.date.issued2017
dc.identifier.citationSchrade, M., Masó, N., Perejón Pazo, A., Pérez Maqueda, L.A. y West, A.R. (2017). Defect chemistry and electrical properties of BiFeO3. Journal of Materials Chemistry C, 5, 10077-10086.
dc.identifier.issn2050-7526es
dc.identifier.urihttps://hdl.handle.net/11441/78686
dc.description.abstractBiFeO attracts considerable attention for its rich functional properties, including room temperature coexistence of magnetic order and ferroelectricity and more recently, the discovery of conduction pathways along ferroelectric domain walls. Here, insights into the defect chemistry and electrical properties of BiFeO are obtained by in situ measurements of electrical conductivity, σ, and Seebeck coefficient, α, of undoped, cation-stoichiometric BiFeO and acceptor-doped BiCaFeO ceramics as a function of temperature and oxygen partial pressure pO. BiCaFeO exhibits p-type conduction; the dependencies of σ and α on pO show that Ca dopants are compensated mainly by oxygen vacancies. By contrast, undoped BiFeO shows a simultaneous increase of σ and α with increasing pO, indicating intrinsic behavior with electrons and holes as the main defect species in almost equal concentrations. The pO-dependency of σ and α cannot be described by a single point defect model but instead, is quantitatively described by a combination of intrinsic and acceptor-doped characteristics attributable to parallel conduction pathways through undoped grains and defect-containing domain walls; both contribute to the total charge transport in BiFeO. Based on this model, we discuss the charge transport mechanism and carrier mobilities of BiFeO and show that several previous experimental findings can readily be explained within the proposed model.es
dc.description.sponsorshipResearch Council of Norway 219731, 228854es
dc.description.sponsorshipMinisterio de Economía y Competitividad CTQ2014-52763-C2-1-Res
dc.description.sponsorshipJunta de Andalucía TEP-7858es
dc.formatapplication/pdfes
dc.language.isoenges
dc.publisherRoyal Society of Chemistry (Great Britain)es
dc.relation.ispartofJournal of Materials Chemistry C, 5, 10077-10086.
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internacional*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.titleDefect chemistry and electrical properties of BiFeO3es
dc.typeinfo:eu-repo/semantics/articlees
dc.type.versioninfo:eu-repo/semantics/submittedVersiones
dc.rights.accessrightsinfo:eu-repo/semantics/openAccesses
dc.contributor.affiliationUniversidad de Sevilla. Departamento de Química Inorgánicaes
dc.relation.projectID219731es
dc.relation.projectID228854es
dc.relation.projectIDCTQ2014-52763-C2-1-Res
dc.relation.projectIDTEP-7858es
dc.relation.publisherversionhttp://dx.doi.org/10.1039/c7tc03345aes
dc.identifier.doi10.1039/c7tc03345aes
idus.format.extent22 p.es
dc.journaltitleJournal of Materials Chemistry Ces
dc.publication.volumen5es
dc.publication.initialPage10077es
dc.publication.endPage10086es

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