Mössbauer Studies of Nickel-Iron Hydrotalcites

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dc.contributor.authorPegelow, U.
dc.contributor.authorWinterer, M.
dc.contributor.authorMosel, B. D.
dc.contributor.authorSchmalz, M.
dc.contributor.authorSchöllhorn, R.
dc.date.accessioned2018-11-10T16:35:32Z
dc.date.available2018-11-10T16:35:32Z
dc.date.issued1994
dc.description.abstractHydrotalcite-like Fe-Ni-hydroxides [Ni2/3IIFe1/3III(OH)2](CO3)1/6(H2O)y , [Ni3/4IIFe1/4III(OH)2]-(CO3)1/8(H2O)y and [Ni3/4II/IIIFe1/4III(OH)2](CO3)0.14(H20)y as well as the ternary oxide NaNi2/3Fe1/3O2 have been studied by 57Fe-Mössbauer spectroscopy. All samples contain Fe3+ in a high spin state. The quadrupole interaction is smaller if a magnetic splitting is present, which may indicate a non-parallel arrangement of the principal axis of the EFG and the hyperfine field. The temperature dependence of the spectra has been understood in terms of collective cluster excitations. In this model the magnetic energy of a single domain depends on the direction of the total magnetic moment and on magnetic interaction with the neighbourhood. The spectral lineshape could be fitted assum­ing uniaxial relaxation.en
dc.identifier.eissn1865-7109
dc.identifier.issn0932-0784
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/8485
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-7631
dc.language.isoen
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/3.0/
dc.subject.ddc530 Physikde
dc.subject.otherMössbauer spectroscopyen
dc.subject.othernickel-iron hydrotalciteen
dc.subject.otherFe(III) high spinen
dc.subject.othercollective cluster excitationsen
dc.titleMössbauer Studies of Nickel-Iron Hydrotalcitesen
dc.typeArticleen
dc.type.versionpublishedVersionen
dcterms.bibliographicCitation.doi10.1515/zna-1994-1215
dcterms.bibliographicCitation.issue12
dcterms.bibliographicCitation.journaltitleZeitschrift für Naturforschung Ade
dcterms.bibliographicCitation.originalpublishernameDe Gruyteren
dcterms.bibliographicCitation.originalpublisherplaceBerlinen
dcterms.bibliographicCitation.pageend1206
dcterms.bibliographicCitation.pagestart1200
dcterms.bibliographicCitation.volume49
tub.accessrights.dnbfree
tub.affiliationFak. 2 Mathematik und Naturwissenschaften::Inst. Chemiede
tub.affiliation.facultyFak. 2 Mathematik und Naturwissenschaftende
tub.affiliation.instituteInst. Chemiede
tub.publisher.universityorinstitutionTechnische Universität Berlinde
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