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  Valence fluctuations in the 3D+3 modulated Yb3Co4Ge13 Remeika phase

Feig, M., Akselrud, L., Motylenko, M., Bobnar, M., Wagler, J., Kvashnina, K. O., et al. (2021). Valence fluctuations in the 3D+3 modulated Yb3Co4Ge13 Remeika phase. Dalton Transactions, 50, 13580-13590. doi:10.1039/d1dt01972d.

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 Creators:
Feig, Manuel1, Author           
Akselrud, Lev1, Author           
Motylenko, Mykhaylo2, Author
Bobnar, Matej1, Author           
Wagler, Joerg2, Author
Kvashnina, Kristina O.2, Author
Levytskyi, Volodymyr2, Author
Rafaja, David2, Author
Leithe-Jasper, Andreas3, Author           
Gumeniuk, Roman4, Author           
Affiliations:
1Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863405              
2External Organizations, ou_persistent22              
3Andreas Leithe-Jasper, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863406              
4Roman Gumeniuk, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863421              

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 Abstract: Yb3Co4Ge13 is the first example of a Remeika phase with a 3D + 3 [space group P43n(alpha,0,0)000(0,alpha,0)000(0,0,alpha)000; a = 8.72328(1) angstrom, alpha = 0.4974(2)] modulated crystal structure. A slight shift of the composition towards higher Yb-content (i.e. Yb3.2Co4Ge12.8) leads to the disappearance of the satellite reflections and stabilization of the disordered primitive cubic [space group Pm3n, a = 8.74072(2) angstrom] Remeika prototype structure. The stoichiometric structurally modulated germanide is a metal with hole-like charge carriers, where Yb-ions are in a temperature-dependent intermediate valence state varying from +2.60 to +2.66 for the temperature range 85-293 K. The valence fluctuations have been investigated by means of temperature dependent X-ray absorption spectroscopy, magnetic susceptibility and thermopower measurements.

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Language(s): eng - English
 Dates: 2021-09-132021-09-13
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: ISI: 000695231200001
DOI: 10.1039/d1dt01972d
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Title: Dalton Transactions
  Abbreviation : Dalton Trans.
Source Genre: Journal
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Publ. Info: Cambridge, UK : Royal Society of Chemistry
Pages: - Volume / Issue: 50 Sequence Number: - Start / End Page: 13580 - 13590 Identifier: ISSN: 1477-9226
CoNE: https://pure.mpg.de/cone/journals/resource/954925269323