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  Intermediate Valence Behavior of Yb2Cu9Al8

Juckel, M., Koželj, P., Prots, Y., Ormeci, A., Burkhardt, U., Leithe-Jasper, A., et al. (2020). Intermediate Valence Behavior of Yb2Cu9Al8. Zeitschrift für anorganische und allgemeine Chemie, 646, 1-7. doi:10.1002/zaac.202000118.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-89AF-B Version Permalink: http://hdl.handle.net/21.11116/0000-0006-AAA0-5
Genre: Journal Article

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 Creators:
Juckel, Martin1, Author              
Koželj, Primož1, Author              
Prots, Yurii2, Author              
Ormeci, Alim1, Author              
Burkhardt, Ulrich3, Author              
Leithe-Jasper, Andreas4, Author              
Svanidze, Eteri1, Author              
Affiliations:
1Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863405              
2Yuri Prots, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863424              
3Ulrich Burkhardt, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863422              
4Andreas Leithe-Jasper, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863406              

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Free keywords: Crystallographic disorder, Intermediate valence, Lanthanides, Magnetic properties, Ytterbium
 Abstract: Intermediate valence behavior is frequently observed in materials containing Ce, Yb, Eu, Sm, or Tm. In the current work, we report synthesis and characterization of Yb2Cu9Al8 (Th2Zn17 structure type). Its intermediate valence behavior can be described by an excitation energy Eex/kB = 319 K and a spin fluctuation temperature Tsf = 60 K. The valence state of Yb is estimated to be close to 2.04 for the low-temperature region. The valence gradually evolves to the value of 2.80 at T = 400 K. The specific heat coefficient of γexp = 59 mJ·molYb –1·K–2 indicates a moderate effective mass enhancement, together with finite density of states at the Fermi level. The latter is also confirmed by the band structure calculations. © 2020 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA.

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Language(s): eng - English
 Dates: 2020-05-272020-05-27
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1002/zaac.202000118
 Degree: -

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Title: Zeitschrift für anorganische und allgemeine Chemie
  Other : J. Inorg. Gen Chem.
  Other : Journal of Inorganic and General Chemistry
  Abbreviation : Z. Anorg. Allg. Chem.
Source Genre: Journal
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Publ. Info: Leipzig, Weinheim : Verlag Johann Ambrosius Barth / Wiley-VCH
Pages: - Volume / Issue: 646 Sequence Number: - Start / End Page: 1 - 7 Identifier: Other: 1521-3749
ISSN: 0044-2313
CoNE: https://pure.mpg.de/cone/journals/resource/954925453895