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dc.contributor.authorDownie, Ruth A.
dc.contributor.authorKennedy, Blair
dc.contributor.authorBiswas, Rajan
dc.contributor.authorSmith, Ronald
dc.contributor.authorBos, Jan-Willem Gezienes
dc.date.accessioned2023-05-30T15:30:30Z
dc.date.available2023-05-30T15:30:30Z
dc.date.issued2023-07-17
dc.identifier.citationDownie , R A , Kennedy , B , Biswas , R , Smith , R & Bos , J-W G 2023 , ' Thermoelectric properties and Kondo transition in the pseudo-gap metals TiNiSi and TiNiGe ' , Zeitschrift für Anorganische und Allgemeine Chemie , vol. 649 , no. 14 , e202300055 . https://doi.org/10.1002/zaac.202300055en
dc.identifier.issn0044-2313
dc.identifier.otherPURE: 286137008
dc.identifier.otherPURE UUID: fdc17095-ad4f-444d-ba12-47653abff557
dc.identifier.otherORCID: /0000-0002-3350-266X/work/136288401
dc.identifier.otherORCID: /0000-0003-3947-2024/work/136288821
dc.identifier.otherScopus: 85160613170
dc.identifier.urihttps://hdl.handle.net/10023/27699
dc.descriptionFunding: Engineering and Physical Sciences Research Council EP/J000884/1, EP/W037300/1 (RAD, BFK).en
dc.description.abstractMaterials with the TiNiSi structure have recently been highlighted as potential thermoelectric materials. Here we report the thermoelectric properties of TiNiX (X = Si and Ge). Both materials behave as defective metals or heavily doped degenerate semiconductors. Room temperature Seebeck coefficients are -45 μV K-1 (Si) and -20 μV K-1 (Ge) with electrical resistivities of 0.5-1 mΩ cm. The lattice thermal conductivities are 8 W m-1 K-1 (Si) and 6 W m-1 K-1 (Ge) at 360 K, which is promising in the absence of alloying. The calculated power factors and figures of merit remain small, with the largest S2/ρ = 0.17 mW m-1 K-2 and peak zT = 5 × 10-3 seen in TiNiSi near 300 K. Both compositions show Kondo behaviour at low-temperatures, linked to the emergence of local moment magnetism, and have substantial magnetoresistance effects at 2 K. This work provides property characterisation for two members of this large class of intermetallic materials.
dc.format.extent10
dc.language.isoeng
dc.relation.ispartofZeitschrift für Anorganische und Allgemeine Chemieen
dc.rightsCopyright © 2023 The Authors. Zeitschrift für anorganische und allgemeine Chemie published by Wiley-VCH GmbH This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.en
dc.subjectThermoelectric materialsen
dc.subjectKondo effecten
dc.subjectIntermetallicen
dc.subjectTiNiSi structureen
dc.subjectHeusler alloysen
dc.subjectQD Chemistryen
dc.subjectTK Electrical engineering. Electronics Nuclear engineeringen
dc.subjectNDASen
dc.subjectMCCen
dc.subject.lccQDen
dc.subject.lccTKen
dc.titleThermoelectric properties and Kondo transition in the pseudo-gap metals TiNiSi and TiNiGeen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Chemistryen
dc.identifier.doihttps://doi.org/10.1002/zaac.202300055
dc.description.statusPeer revieweden


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