Structural, Mössbauer spectroscopic and magnetochemical investigations into EuPt5, TmPt5 and TmPt3 synthesized from platinum and gaseous lanthanide
Identifieur interne : 002B35 ( Main/Merge ); précédent : 002B34; suivant : 002B36Structural, Mössbauer spectroscopic and magnetochemical investigations into EuPt5, TmPt5 and TmPt3 synthesized from platinum and gaseous lanthanide
Auteurs : M. Sauer [Allemagne] ; S. Raetz [Allemagne] ; V. Ohm [Allemagne] ; M. Merkens [Allemagne] ; C. Sauer [Allemagne] ; D. Schmitz [Allemagne] ; H. Schilder [Allemagne] ; H. Lueken [Allemagne]Source :
- Journal of Alloys and Compounds [ 0925-8388 ] ; 1997.
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Abstract
Abstract: EuPt5, TmPt5, and TmPt3 were prepared by reaction of the gaseous lanthanides with Pt at 1200, 1300, and 1500°C respectively. Structural investigations established that the former two crystallize in CaCu5-type related superstructures, the details being still under investigation. 151Eu Mössbauer spectroscopy and magnetic susceptibility measurements revealed that EuPt5 is a mixed-valent europium alloy containing both trivalent (Eu[4f6]) and intermediate-valent Eu, the latter as a dynamic mixture of the [4f6] and [4f7] configurations. The magnetochemical analysis of TmPt1 (AuCu1-type structure) on the basis of a crystal field/molecular field model disclosed trivalent Tm[4f12] with a singlet crystal field ground state and the absence of magnetic ordering (for T≥1.7K).
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DOI: 10.1016/S0925-8388(96)02471-1
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Merkens</name><affiliation wicri:level="3"><country xml:lang="fr">Allemagne</country><wicri:regionArea>Institut für Anorganische Chemie der Technischen Hochschule Aachen, Prof._Pirlet-Str. I. D-52056 Aachen</wicri:regionArea><placeName><region type="land" nuts="1">Rhénanie-du-Nord-Westphalie</region><region type="district" nuts="2">District de Cologne</region><settlement type="city">Aix-la-Chapelle</settlement></placeName></affiliation></author><author><name sortKey="Sauer, C" sort="Sauer, C" uniqKey="Sauer C" first="C." last="Sauer">C. Sauer</name><affiliation wicri:level="1"><country xml:lang="fr">Allemagne</country><wicri:regionArea>Institut für Festkörperforschung, Forschungszentrum Julich GmbH, D-52425 Jülich</wicri:regionArea><wicri:noRegion>52425 Jülich</wicri:noRegion><wicri:noRegion>D-52425 Jülich</wicri:noRegion></affiliation></author><author><name sortKey="Schmitz, D" sort="Schmitz, D" uniqKey="Schmitz D" first="D." last="Schmitz">D. 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D-52056 Aachen</wicri:regionArea><placeName><region type="land" nuts="1">Rhénanie-du-Nord-Westphalie</region><region type="district" nuts="2">District de Cologne</region><settlement type="city">Aix-la-Chapelle</settlement></placeName></affiliation></author></analytic><monogr></monogr><series><title level="j">Journal of Alloys and Compounds</title><title level="j" type="abbrev">JALCOM</title><idno type="ISSN">0925-8388</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="1997">1997</date><biblScope unit="volume">246</biblScope><biblScope unit="issue">1–2</biblScope><biblScope unit="page" from="147">147</biblScope><biblScope unit="page" to="154">154</biblScope></imprint><idno type="ISSN">0925-8388</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0925-8388</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Crystal field parameters</term><term>Cubic crystal field</term><term>Electron diffraction</term><term>Ground state</term><term>Intensity data</term><term>Intermediate valence</term><term>Large atoms</term><term>Lattice parameters</term><term>Resonance peaks</term><term>Satellite reflections</term><term>Structure models</term></keywords><keywords scheme="Teeft" xml:lang="en"><term>Crystal field parameters</term><term>Cubic crystal field</term><term>Electron diffraction</term><term>Ground state</term><term>Intensity data</term><term>Intermediate valence</term><term>Large atoms</term><term>Lattice parameters</term><term>Resonance peaks</term><term>Satellite reflections</term><term>Structure models</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Abstract: EuPt5, TmPt5, and TmPt3 were prepared by reaction of the gaseous lanthanides with Pt at 1200, 1300, and 1500°C respectively. Structural investigations established that the former two crystallize in CaCu5-type related superstructures, the details being still under investigation. 151Eu Mössbauer spectroscopy and magnetic susceptibility measurements revealed that EuPt5 is a mixed-valent europium alloy containing both trivalent (Eu[4f6]) and intermediate-valent Eu, the latter as a dynamic mixture of the [4f6] and [4f7] configurations. The magnetochemical analysis of TmPt1 (AuCu1-type structure) on the basis of a crystal field/molecular field model disclosed trivalent Tm[4f12] with a singlet crystal field ground state and the absence of magnetic ordering (for T≥1.7K).</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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