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hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorWATTIAUX, Alain
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorFOURNÈS, Léopold
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorZHOU, F.
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorGRENIER, Jean-Claude
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorPOUCHARD, Michel
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorETOURNEAU, Jean
dc.date.created1997
dc.date.issued1997
dc.identifier.issn1155-4339
dc.description.abstractEnThe nonstoichiometry and the vacancy ordering in the perovskite Ca2LaFe3O8 has been investigated in previous works [1,2]. More recently, the occurrence of a large nonstoichiometric domain has been shown in the Sr2LaFe3O8+δ system [3]. Thus, we have used a new "Chimie Douce" method : electrochemical oxidation which has been developped in our laboratory [4] for obtaining Sr2LaFe3O8.90 in alkaline medium. The starting material Sr2LaFe3O8 has been characterized by XRD, chemical analysis and Mössbauer spectroscopy. This compound contains only Fe3+. The Mössbauer spectroscopy reveals, in the oxidized phase, the occurrence of antiferromagnetic interaction below TN = 195 K with a good agreement with electric and magnetic measurements. At low temperature, the presence of two sextets can be explained in terms of a charge disproportionation : 2 Fe 4+ → Fe(4-λ)+ + Fe(4+λ)+ .
dc.language.isoen
dc.publisherEDP Sciences
dc.subject.enPerovskite
dc.subject.enNonstoichiometric
dc.subject.enMössbauer spectroscopy
dc.subject.enOxidation
dc.subject.enElectrochemistry
dc.title.enMössbauer Characteristics of the Nonstoichiometric Sr2LaFe3O8+δ Perovskite Obtained by Electrochemical Oxidation
dc.typeArticle de revue
dc.identifier.doi10.1051/jp4:19971142
dc.subject.halPhysique [physics]/Articles anciens
bordeaux.journalJournal de Physique IV Proceedings
bordeaux.pageC1-351-C1-352
bordeaux.volume07
bordeaux.issueC1
bordeaux.peerReviewedoui
hal.identifierjpa-00254786
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//jpa-00254786v1
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