Relation between Electronic Structure and Thermoelectric Properties of Heusler-Type Ru2VAl Compounds

Abstract

We investigated Heusler-type Ru2VAl, a candidate material for next-generation thermoelectric conversion, by first-principle calculations of its thermoelectric conversion properties and direct experimental observations of its electronic structures, employing photoemission and infrared spectroscopy. Our results show that Ru2VAl has a wider pseudogap near the Fermi level compared to Fe2VAl. Accordingly, a higher thermoelectric conversion performance can be expected in Ru2VAl at higher temperatures.

First-principles study on novel Fe-based quaternary Heusler alloys, with robust half-metallic, thermoelectric and optical properties

“…Additionally, in recent years, experimental research have examined the spintronics and thermoelectric application of Heusler compounds. [35][36][37][38][39][40][41] In this case, A. El-Khouly, et al synthesized FeV 0.24 Nb 0.4 Hf 0.16 Ti 0.2 Sb Heusler alloys by employing arc melting followed by induction melting and investigated the thermoelectric properties of these alloys. 39 Their method led to, with low thermal conductivity and gure of merit value of 0.44 at 725 K for FeV 0.24 Nb 0.4 Hf 0.16 Ti 0.2 Sb, suitable for thermoelectric applications.…”