6533b859fe1ef96bd12b8012
RESEARCH PRODUCT
Tuning the carrier concentration for thermoelectrical application in the quaternary Heusler compound Co2TiAl(1−x)Six
Sascha PopulohAnke WeidenkaffClaudia FelserJoachim BarthBenjamin BalkeTanja Grafsubject
Materials scienceCondensed matter physicsMechanical EngineeringMetals and AlloysElectronic structureengineering.materialCondensed Matter PhysicsThermoelectric materialsHeusler compoundFerromagnetismMechanics of MaterialsThermocoupleElectrical resistivity and conductivitySeebeck coefficientThermoelectric effectengineeringGeneral Materials Sciencedescription
The family of half-metallic ferromagnets Co2TiZ exhibits exceptional transport properties. The investigated compounds Co2TiAl(1−x)Six (x = 0.25, 0.5, 0.75) show Curie temperatures (TCs) that vary between 250 and 350 K, depending on the composition. Above TC the Seebeck coefficient remains constant. This makes them promising candidates for thermoelectric devices such as thermocouples with a tunable working range. The electrical resistivity data show an anomaly at TC which is attributed to changes in the electronic structure and therefore in the carrier concentration.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2010-11-01 | Scripta Materialia |