Room-temperature ferromagnetism in the mixtures of the TiO₂ and Co₃O₄ powders

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dc.contributor.authorSerrano, A., A.
dc.contributor.authorPlaza, M.
dc.contributor.authorPérez García, Lucas
dc.contributor.authorVenta, J. de la
dc.contributor.authorLLopis, J.
dc.contributor.authorGarcía, M. A.
dc.date.accessioned2023-06-20T00:35:45Z
dc.date.available2023-06-20T00:35:45Z
dc.date.issued2009-04
dc.description©2009 The American Physical Society. Artículo firmado por más de diez autores. This work was supported by the Spanish Council for Scientific Research through the CSIC Projects No. 2006- 50F0122 and No. 2007-50I015 and Spanish Ministry of Science and Education through the Projects No. MAT2007- 66845-C02-01 and No. FIS-2008-06249. We acknowledge the European Synchrotron Radiation Facility for provision of synchrotron radiation facilities, and we would like to thank the SpLine CRG Beamline staff for assistance during x-ray absorption experiments.
dc.description.abstractWe report here the observation of ferromagnetism (FM) at 300 K in mixtures of TiO₂ and Co₃O₄ powders despite the antiferromagnetic and diamagnetic characters of both oxides, respectively. The ferromagnetic behavior is found in the early stages of reaction and only for TiO₂ in anatase structure; no FM is found for identical samples prepared with rutile-TiO². Optical spectroscopy and x-ray absorption spectra confirm a surface reduction of octahedral Co^(+3) -> Co^(+2) in the mixtures which is in the origin of the observed magnetism.
dc.description.departmentDepto. de Física de Materiales
dc.description.facultyFac. de Ciencias Físicas
dc.description.refereedTRUE
dc.description.sponsorshipMinisterio de Ciencia y Educación
dc.description.sponsorshipSpanish Council for Scientific Research
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/45455
dc.identifier.doi10.1103/PhysRevB.79.144405
dc.identifier.issn1098-0121
dc.identifier.officialurlhttp://dx.doi.org/10.1103/PhysRevB.79.144405
dc.identifier.relatedurlhttps://journals.aps.org
dc.identifier.urihttps://hdl.handle.net/20.500.14352/42777
dc.issue.number14
dc.journal.titlePhysical review B
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.relation.projectIDMAT2007- 66845-C02-01
dc.relation.projectIDFIS-2008-06249
dc.relation.projectID2006- 50F0122
dc.relation.projectID2007-50I015
dc.rights.accessRightsopen access
dc.subject.cdu538.9
dc.subject.keywordMagnetic semiconductors
dc.subject.keywordOxides
dc.subject.keywordZnO
dc.subject.ucmFísica de materiales
dc.subject.ucmFísica del estado sólido
dc.subject.unesco2211 Física del Estado Sólido
dc.titleRoom-temperature ferromagnetism in the mixtures of the TiO₂ and Co₃O₄ powders
dc.typejournal article
dc.volume.number79
dspace.entity.typePublication
relation.isAuthorOfPublication01b88344-8278-4947-9475-d5b2a652b9d7
relation.isAuthorOfPublication.latestForDiscovery01b88344-8278-4947-9475-d5b2a652b9d7
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