Mössbauer Characteristics of the Nonstoichiometric Sr2LaFe3O8+δ Perovskite Obtained by Electrochemical Oxidation
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | WATTIAUX, Alain | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | FOURNÈS, Léopold | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | ZHOU, F. | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | GRENIER, Jean-Claude | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | POUCHARD, Michel | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | ETOURNEAU, Jean | |
| dc.date.created | 1997 | |
| dc.date.issued | 1997 | |
| dc.identifier.issn | 1155-4339 | |
| dc.description.abstractEn | The 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.iso | en | |
| dc.publisher | EDP Sciences | |
| dc.subject.en | Perovskite | |
| dc.subject.en | Nonstoichiometric | |
| dc.subject.en | Mössbauer spectroscopy | |
| dc.subject.en | Oxidation | |
| dc.subject.en | Electrochemistry | |
| dc.title.en | Mössbauer Characteristics of the Nonstoichiometric Sr2LaFe3O8+δ Perovskite Obtained by Electrochemical Oxidation | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1051/jp4:19971142 | |
| dc.subject.hal | Physique [physics]/Articles anciens | |
| bordeaux.journal | Journal de Physique IV Proceedings | |
| bordeaux.page | C1-351-C1-352 | |
| bordeaux.volume | 07 | |
| bordeaux.issue | C1 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | jpa-00254786 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//jpa-00254786v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal%20de%20Physique%20IV%20Proceedings&rft.date=1997&rft.volume=07&rft.issue=C1&rft.spage=C1-351-C1-352&rft.epage=C1-351-C1-352&rft.eissn=1155-4339&rft.issn=1155-4339&rft.au=WATTIAUX,%20Alain&FOURN%C3%88S,%20L%C3%A9opold&ZHOU,%20F.&GRENIER,%20Jean-Claude&POUCHARD,%20Michel&rft.genre=article |
Fichier(s) constituant ce document
| Fichiers | Taille | Format | Vue |
|---|---|---|---|
|
Il n'y a pas de fichiers associés à ce document. |
|||