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  Evolution of Ce-Valence in Ce-Rh-Si Compounds: Intermediate Valence in CeRh6Si4

Gruner, T., & Geibel, C. (2017). Evolution of Ce-Valence in Ce-Rh-Si Compounds: Intermediate Valence in CeRh6Si4. Solid State Phenomena, 257, 199-202. doi:10.4028/www.scientific.net/SSP.257.199.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-5F64-0 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-6135-9
Genre: Journal Article

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 Creators:
Gruner, Thomas1, Author              
Geibel, Christoph2, Author              
Affiliations:
1Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              
2Christoph Geibel, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863465              

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Free keywords: Valence Fluctuations, Magnetic Properties, Ce-Compounds
 Abstract: We synthesized polycrystalline samples of CeRh6Si4 and investigated its physical properties by means of magnetic susceptibility, specific heat and electrical resistivity measurements as well as LIII X-ray absorption spectroscopy. All results evidence an intermediate-valent (IV) Ce state with a valence close to 3.2 and a characteristic energy of about 300 K. Accordingly, we observe a Fermi liquid ground state at low temperatures with a slightly enhanced Sommerfeld coefficient γ = 28 mJ/molK2. Using presently available data on different compounds, we analyze the evolution of the Ce valence in the Ce-Rh-Si ternary phase diagram. The expected correlation with the distance to nearest Ce-ligands can be discerned. Thus, the evolution from a trivalent Ce3+ state in CeRh3Si2 to an IV state in CeRh6Si4 is related to a shortening of both the Ce-Rh and Ce-Si bonds in the first coordination sphere of Ce.

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Language(s): eng - English
 Dates: 2017-01-182017-01-18
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.4028/www.scientific.net/SSP.257.199
BibTex Citekey: gruner2017
 Degree: -

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Title: Solid State Phenomena
Source Genre: Journal
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Publ. Info: Vaduz, Liechtenstein : Sci-Tech Publications
Pages: - Volume / Issue: 257 Sequence Number: - Start / End Page: 199 - 202 Identifier: ISSN: 1012-0394
CoNE: /journals/resource/954928607148