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Mössbauer investigation of 57Fe-doped Ni(III) perovskites ANi0.98Fe0.02O3 (A = Pr, Nd, Sm, Y, Lu, Tl) versus temperature

hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorKIM, Seung-Joo
hal.structure.identifierChair of Radiochemistry, Department of Chemistry
dc.contributor.authorPRESNIAKOV, Igor
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDEMAZEAU, Gérard
hal.structure.identifierChair of Radiochemistry, Department of Chemistry
dc.contributor.authorPOKHOLOK, Konstantin
hal.structure.identifierChair of Radiochemistry, Department of Chemistry
dc.contributor.authorBARANOV, Alexey
hal.structure.identifierChair of Radiochemistry, Department of Chemistry
dc.contributor.authorSOBOLEV, Alexey
hal.structure.identifierChair of Radiochemistry, Department of Chemistry
dc.contributor.authorPANKRATOV, Denis
hal.structure.identifierInstitute of Problems of Chemical Physics
dc.contributor.authorOVANESYAN, Nikolay S.
dc.date.issued2002
dc.identifier.issn0022-4596
dc.description.abstractEnNickelates ANiO3 (A=Pr, Nd, Sm, Lu, Y, Tl) containing Mössbauer probe 57Fe atoms were synthesized. In the case of nickelates with larger rare earth (A=Pr, Nd, Sm) the Mössbauer spectra confirm that ferric ions are located in single type of crystallographic positions. On the contrary, the spectra of ANi0.98Fe0.02O3 with small cations (A=Lu, Y, Tl) can be described as a superposition of two sub-spectra which indicate that 57Fe probe atoms are simultaneously stabilized in two non-equivalent crystallographic positions. These results have been interpreted in terms of partial charge disproportionation of Ni3+ cations associated with the electronic localization in monoclinic distorted Lu, Y, Tl nickelates. The modification of 57Fe spectra for TlNi0.98Fe0.02O3 as a function of temperature has shown that this charge disproportionation occurs in varying degrees, corresponding to the charge states Fe(3+σ)+ and Fe(3−σ′)+. On the contrary, the spectra for Lu and Y nickelates show that charge variation (σ,σ′) for dopant Fe(1) and Fe(2) cations does not depend on temperature.
dc.language.isoen
dc.publisherElsevier
dc.title.enMössbauer investigation of 57Fe-doped Ni(III) perovskites ANi0.98Fe0.02O3 (A = Pr, Nd, Sm, Y, Lu, Tl) versus temperature
dc.typeArticle de revue
dc.identifier.doi10.1006/jssc.2002.9699
dc.subject.halChimie/Matériaux
bordeaux.journalJournal of Solid State Chemistry
bordeaux.page126-133
bordeaux.volume168
bordeaux.issue1
bordeaux.peerReviewedoui
hal.identifierhal-00817239
hal.version1
hal.popularnon
hal.audienceInternationale
dc.subject.itMössbauer spectroscopy
dc.subject.itPerovskite
dc.subject.itTrivalent nickel
dc.subject.itCharge disproportionation
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00817239v1
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