Publications by authors named "Sascha Populoh"
Article Synopsis
- One-dimensional Haldane gap materials, like rare earth barium chain nickelates, exhibit strong spin antiferromagnetic properties and unique structures that make them interesting for thermoelectric applications.
- The material CaBaGdNiO shows impressive Seebeck coefficients of 140-280 μV K at high temperatures, maintained even with significant acceptor-substitution levels due to low dimensionality and electronic correlations.
- Despite low thermal conductivities of around 1.5 W m K, ideal for thermoelectrics, the electrical conductivity of these materials is still insufficient, highlighting the need to improve electronic band structures and microstructural features to boost charge carrier mobility.
Nano-grained CoSb was 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 CoSb can serve as model compound to study the impact of a nanostructure on the thermoelectric properties, especially the phonon thermal conductivity.
View Article and Find Full Text PDF(TiZrHf)NiSn half-Heusler compounds were prepared by arc melting and their thermoelectric properties characterized in the temperature range between 325 K and 857 K, resulting in a Figure of Merit ZT ≈ 0.45. Furthermore, the prepared samples were used to construct a unileg module.
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