title: Multiband Transport in CoSb3Prepared by Rapid Solidification.
abstract: Nano-grained CoSb3was prepared by melt-spinning and subsequent spark plasma sintering. The phonon thermal conductivity of skutterudites is known to be sensitive to the kind and the amount of guest atoms. Thus, unfilled CoSb3can serve as model compound to study the impact of a nanostructure on the thermoelectric properties, especially the phonon thermal conductivity. Therefore, a series of materials was prepared differing only by the cooling speed during the quenching procedure. In contrast to clathrates, the microstructure of meltspun CoSb3was found to be sensitive to the cooling speed. Although the phonon thermal conductivity, studied by means of Flash and 3ωmeasurements, was found to be correlated with the grain size, the bulk density of the sintered materials had an even stronger impact. Interestingly, the reduced bulk density did not result in an increased electrical resistivity. The influence of Sb and CoSb2as foreign phase on the electronic properties of CoSb3was revealed by a multi-band Hall effect analysis. While CoSb2increases the charge carrier density, the influence of the highly mobile charge carriers introduced by elemental Sb on the thermoelectric properties of the composite offer an interesting perspective for the preparation of efficient thermoelectric composite materials.
authors.affiliation: Institute of Solid State Physics, TU Wien, Wiedner Hauptstr. 8-10, 1040 Vienna, Austria.
authors.forename: Matthias
authors.initials: M
authors.lastname: Ikeda
authors.affiliation: Institute of Solid State Physics, TU Wien, Wiedner Hauptstr. 8-10, 1040 Vienna, Austria.
authors.forename: Petr
authors.initials: P
authors.lastname: Tomeš
authors.affiliation: Institute of Solid State Physics, TU Wien, Wiedner Hauptstr. 8-10, 1040 Vienna, Austria.
authors.forename: Lukas
authors.initials: L
authors.lastname: Prochaska
authors.affiliation: Solid State Chemistry and Catalysis, Empa, Überlandstr. 129, 8600 Dübendorf, Switzerland.
authors.forename: James
authors.initials: J
authors.lastname: Eilertsen
authors.affiliation: Solid State Chemistry and Catalysis, Empa, Überlandstr. 129, 8600 Dübendorf, Switzerland.
authors.forename: Sascha
authors.initials: S
authors.lastname: Populoh
authors.affiliation: University Service Centre for Transmission Electron Microscopy, TU Wien, Wiedner Hauptstr. 8-10, 1040 Vienna, Austria.
authors.forename: Stefan
authors.initials: S
authors.lastname: Löffler
authors.affiliation: Institute of Solid State Physics, TU Wien, Wiedner Hauptstr. 8-10, 1040 Vienna, Austria.
authors.forename: Robert
authors.initials: R
authors.lastname: Svagera
authors.affiliation: Institute of Solid State Physics, TU Wien, Wiedner Hauptstr. 8-10, 1040 Vienna, Austria.
authors.forename: Monika
authors.initials: M
authors.lastname: Waas
authors.affiliation: Institute of Solid State Physics, TU Wien, Wiedner Hauptstr. 8-10, 1040 Vienna, Austria.
authors.forename: Herbert
authors.initials: H
authors.lastname: Sassik
authors.affiliation: Solid State Chemistry and Catalysis, Empa, Überlandstr. 129, 8600 Dübendorf, Switzerland; Institute for Materials Science, University of Stuttgart, Heisenbergstr. 3, Stuttgart, Germany.
authors.forename: Anke
authors.initials: A
authors.lastname: Weidenkaff
authors.affiliation: Institute of Solid State Physics, TU Wien, Wiedner Hauptstr. 8-10, 1040 Vienna, Austria.
authors.forename: Silke
authors.initials: S
authors.lastname: Paschen
keywords: Melt‐spinning; Multiband; Skutterudite