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Thermoelectric properties and Kondo transition in the pseudo-gap metals TiNiSi and TiNiGe
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dc.contributor.author | Downie, Ruth A. | |
dc.contributor.author | Kennedy, Blair | |
dc.contributor.author | Biswas, Rajan | |
dc.contributor.author | Smith, Ronald | |
dc.contributor.author | Bos, Jan-Willem Gezienes | |
dc.date.accessioned | 2023-05-30T15:30:30Z | |
dc.date.available | 2023-05-30T15:30:30Z | |
dc.date.issued | 2023-07-17 | |
dc.identifier | 286137008 | |
dc.identifier | fdc17095-ad4f-444d-ba12-47653abff557 | |
dc.identifier | 85160613170 | |
dc.identifier.citation | Downie , 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.202300055 | en |
dc.identifier.issn | 0044-2313 | |
dc.identifier.other | ORCID: /0000-0002-3350-266X/work/136288401 | |
dc.identifier.other | ORCID: /0000-0003-3947-2024/work/136288821 | |
dc.identifier.uri | https://hdl.handle.net/10023/27699 | |
dc.description | Funding: Engineering and Physical Sciences Research Council EP/J000884/1, EP/W037300/1 (RAD, BFK). | en |
dc.description.abstract | Materials 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.extent | 10 | |
dc.format.extent | 2249893 | |
dc.language.iso | eng | |
dc.relation.ispartof | Zeitschrift für Anorganische und Allgemeine Chemie | en |
dc.subject | Thermoelectric materials | en |
dc.subject | Kondo effect | en |
dc.subject | Intermetallic | en |
dc.subject | TiNiSi structure | en |
dc.subject | Heusler alloys | en |
dc.subject | QD Chemistry | en |
dc.subject | TK Electrical engineering. Electronics Nuclear engineering | en |
dc.subject | NDAS | en |
dc.subject | MCC | en |
dc.subject.lcc | QD | en |
dc.subject.lcc | TK | en |
dc.title | Thermoelectric properties and Kondo transition in the pseudo-gap metals TiNiSi and TiNiGe | en |
dc.type | Journal article | en |
dc.contributor.institution | University of St Andrews. School of Chemistry | en |
dc.identifier.doi | 10.1002/zaac.202300055 | |
dc.description.status | Peer reviewed | en |
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