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  Mn-for-Fe substitution in Fe1-xMnxIn2S4 thiospinel – Crystal structure and thermoelectric properties

Wyżga, P., Veremchuk, I., Koželj, P., Leithe-Jasper, A., & Gumeniuk, R. (2021). Mn-for-Fe substitution in Fe1-xMnxIn2S4 thiospinel – Crystal structure and thermoelectric properties. Journal of Physics and Chemistry of Solids, 152: 109984, pp. 1-7. doi:10.1016/j.jpcs.2021.109984.

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 Creators:
Wyżga, Paweł1, Author              
Veremchuk, Igor2, Author              
Koželj, Primož1, 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              
2Igor Veremchuk, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863411              
3Andreas Leithe-Jasper, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863406              
4External Organizations, ou_persistent22              

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Free keywords: Chemical substitution, Indium thiospinel, Solid solution, Thermoelectric properties
 Abstract: Crystal structure as well as magnetic and thermoelectric properties of the quaternary Fe1-xMnxIn2S4 thiospinel were investigated. A complete homogeneity range between FeIn2S4 and MnIn2S4 was confirmed by powder X-ray diffraction phase analysis supported by a linear increase of the cubic unit-cell parameter for greater Mn content, obeying Vegard's law. Rietveld refinement revealed a gradual decrease of the inversion parameter i upon incorporation of Mn into the structure, which indicated a change from inverse spinel (for FeIn2S4) to nearly-normal spinel (for MnIn2S4). This quaternary compound is an n-type semiconductor with high electrical resistivity ρ > 5 × 10−4 Ω m and Seebeck coefficient |α| > 250 μV K−1 above RT. The thermal conductivity followed a compositional dependence typical for solid solutions and thus revealed a minimum for samples with 0.4 < x ≤ 0.8. The power factor and thermoelectric figure of merit monotonously decreased for greater Mn content within the quaternary compound. All samples showed magnetic transitions below 12 K with antiferromagnetic interactions. The determined effective magnetic moments corresponded to values for Fe2+ and Mn2+ ions. © 2021 Elsevier Ltd

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Language(s): eng - English
 Dates: 2021-01-292021-01-29
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1016/j.jpcs.2021.109984
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Title: Journal of Physics and Chemistry of Solids
Source Genre: Journal
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Publ. Info: Oxford : Pergamon
Pages: - Volume / Issue: 152 Sequence Number: 109984 Start / End Page: 1 - 7 Identifier: ISSN: 0022-3697
CoNE: https://pure.mpg.de/cone/journals/resource/110992357322388