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  Ternary MIn2S4 (M = Mn, Fe, Co, Ni) Thiospinels - Crystal Structure and Thermoelectric Properties

Wyżga, P., Veremchuk, I., Bobnar, M., Hennig, C., Leithe-Jasper, A., & Gumeniuk, R. (2020). Ternary MIn2S4 (M = Mn, Fe, Co, Ni) Thiospinels - Crystal Structure and Thermoelectric Properties. Zeitschrift für anorganische und allgemeine Chemie, 646(14), 1091-1098. doi:10.1002/zaac.202000014.

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Wyżga, Paweł1, Autor           
Veremchuk, Igor2, Autor           
Bobnar, Matej1, Autor           
Hennig, Christoph3, Autor
Leithe-Jasper, Andreas4, Autor           
Gumeniuk, Roman3, Autor
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              
3External Organizations, ou_persistent22              
4Andreas Leithe-Jasper, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863406              

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Schlagwörter: TETRAHEDRAL SITES; PERFORMANCEChemistry; Solid-phase synthesis; Spinel phases; Sulfur; X-ray diffraction; Thermoelectric;
 Zusammenfassung: A combined structural, magnetic and thermoelectric study of polycrystalline ternary MIn2S4 (M = Mn, Fe, Co, Ni) thiospinels is presented. All compounds crystallize with MgAl2O4-type structure. Rietveld refinement analysis confirmed that the preferred crystallographic position of transition metal element changes from mainly tetrahedral 8a for Mn to exclusively octahedral 16d for Ni (i.e. increase of the inversion parameter). Magnetic susceptibility measurements revealed M-elements to possess 2+ oxidation state in MIn2S4. All these compounds order antiferromagnetically with Neel temperatures T-N ranging from 5-13 K. The studied thiospinels are n-type semiconductors with large values of electrical resistivity rho > 0.6 omega center dot m at room temperature. An increase of the inversion parameter leads to a reduction of the determined activation energies, as well as to a more disorder-like behavior of thermal conductivity. The highest thermoelectric Figure of merit ZT was observed for MIn2S4 with M = Fe, Ni, which adopt inverse spinel structure.

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Sprache(n): eng - English
 Datum: 2020-02-172020-02-17
 Publikationsstatus: Erschienen
 Seiten: 9
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: ISI: 000522762600001
DOI: 10.1002/zaac.202000014
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Titel: Zeitschrift für anorganische und allgemeine Chemie
Genre der Quelle: Zeitschrift
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Affiliations:
Ort, Verlag, Ausgabe: POSTFACH 101161, 69451 WEINHEIM, GERMANY : WILEY-V C H VERLAG GMBH
Seiten: - Band / Heft: 646 (14) Artikelnummer: - Start- / Endseite: 1091 - 1098 Identifikator: ISSN: 0044-2313