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  Valence fluctuations of europium in the boride Eu4Pd29+xB8

Gumeniuk, R., Schnelle, W., Ahmida, M. A., Abd-Elmeguid, M. M., Kvashnina, K. O., Tsirlin, A. A., et al. (2016). Valence fluctuations of europium in the boride Eu4Pd29+xB8. Journal of Physics: Condensed Matter, 28(11): 115601, pp. 1-9. doi:10.1088/0953-8984/28/11/115601.

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 Urheber:
Gumeniuk, Roman1, Autor           
Schnelle, Walter2, Autor           
Ahmida, Mahmoud A.3, Autor
Abd-Elmeguid, Mohsen M.3, Autor
Kvashnina, Kristina O.3, Autor
Tsirlin, Alexander A.4, Autor           
Leithe-Jasper, Andreas5, Autor           
Geibel, Christoph6, Autor           
Affiliations:
1Roman Gumeniuk, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863421              
2Walter Schnelle, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863441              
3External Organizations, ou_persistent22              
4Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863405              
5Andreas Leithe-Jasper, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863406              
6Christoph Geibel, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863465              

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 Zusammenfassung: We synthesized a high-quality sample of the boride Eu4Pd29+xB8 (x = 0.76) and studied its structural and physical properties. Its tetragonal structure was solved by direct methods and confirmed to belong to the Eu4Pd29B8 type. All studied physical properties indicate a valence fluctuating Eu state, with a valence decreasing continuously from about 2.9 at 5 K to 2.7 at 300 K. Maxima in the T dependence of the susceptibility and thermopower at around 135 K and 120 K, respectively, indicate a valence fluctuation energy scale on the order of 300 K. Analysis of the magnetic susceptibility evidences some inconsistencies when using the ionic interconfigurational fluctuation (ICF) model, thus suggesting a stronger relevance of hybridization between 4f and valence electrons compared to standard valence-fluctuating Eu systems.

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Sprache(n): eng - English
 Datum: 2016-02-192016-02-19
 Publikationsstatus: Erschienen
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 Identifikatoren: ISI: 000370733400013
DOI: 10.1088/0953-8984/28/11/115601
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Titel: Journal of Physics: Condensed Matter
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Bristol : IOP Publishing
Seiten: - Band / Heft: 28 (11) Artikelnummer: 115601 Start- / Endseite: 1 - 9 Identifikator: ISSN: 0953-8984
CoNE: https://pure.mpg.de/cone/journals/resource/954928562478