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  Valence State of Eu and Superconductivity in Se-Substituted EuSr2Bi2S4F4 and Eu2SrBi2S4F4

Haque, Z., Thakur, G. S., Selvan, G. K., Block, T., Janka, O., Poettgen, R., et al. (2018). Valence State of Eu and Superconductivity in Se-Substituted EuSr2Bi2S4F4 and Eu2SrBi2S4F4. Inorganic Chemistry, 57(1), 37-44. doi:10.1021/acs.inorgchem.7b01555.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0000-6443-4 Version Permalink: http://hdl.handle.net/21.11116/0000-0000-644B-C
Genre: Journal Article

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 Creators:
Haque, Zeba1, Author
Thakur, Gohil Singh2, Author              
Selvan, Ganesan Kalai1, Author
Block, Theresa1, Author
Janka, Oliver1, Author
Poettgen, Rainer1, Author
Joshi, Amish G.1, Author
Parthasarathy, Rangasamy1, Author
Arumugam, Sonachalam1, Author
Gupta, Laxmi Chand1, Author
Ganguli, Ashok Kumar1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              

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 Abstract: Recently, we reported the synthesis and investigations of EuSr2Bi2S4F4 and Eu2SrBi2S4F4. We have now been able to induce superconductivity in EuSr2Bi2S4F4 by Se substitution at the S site (isovalent-substitution) with T-c = 2.9 K in EuSr2Bi2S2Se2F4. The other compound, Eu2SrBi2S4F4, shows a significant enhancement of Tc. In Se-substituted Eu2SrBi2S4-xSexF4, we find T-c = 2.6 K for x = 1.5 and T-c = 2.8 K for x = 2, whereas T-c = 0.4 K in the Se-free sample. In addition to Superconductivity, an important effect associated with Se substitution is that it gives rise to remarkable changes in the Eu valence. Our Eu-151 Mossbauer and X-ray photoemission spectroscopic measurements show that Se substitution in both of the compounds Eu2SrBi2S4F4 and EuSr2Bi2S4F4 gives rise to an increase in the Eu2+ component in the mixed-valence state of Eu.

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Language(s): eng - English
 Dates: 2018-01-152018-01-15
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1021/acs.inorgchem.7b01555
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Title: Inorganic Chemistry
  Abbreviation : Inorg. Chem.
Source Genre: Journal
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Publ. Info: Washington, DC : American Chemical Society
Pages: - Volume / Issue: 57 (1) Sequence Number: - Start / End Page: 37 - 44 Identifier: ISSN: 0020-1669
CoNE: /journals/resource/0020-1669