Szczegóły publikacji
Opis bibliograficzny
Unusual electron structure and electron transport properties of some disordered half-Heusler phases / Janusz TOBOŁA, Lucie Jodin, Pierre Pecheur, Gerard Venturini // Journal of Alloys and Compounds ; ISSN 0925-8388. — 2004 — vol. 383 iss. 1–2, s. 328–333. — Bibliogr. s. 333, Abstr. — Proceedings of the 14th International Conference on Solid Comp. : Linz, Austria, 6–11 July 2003
Autorzy (4)
- AGHToboła Janusz Stefan
- Jodin Lucie
- Pecheur Pierre
- Venturini Gerard
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 21997 |
|---|---|
| Data dodania do BaDAP | 2005-05-04 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.jallcom.2004.04.041 |
| Rok publikacji | 2004 |
| Typ publikacji | referat w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Journal of Alloys and Compounds |
Abstract
The electronic structure the Korringa-Kohn-Rostoker method with the coherent potential approximation (KKR-CPA) calculations performed on disordered half-Heusler ZrFe1-xPtxSb and HfFe1-xNi xSb showed a vanishing density of states at the Fermi level for the composition x=0.5. Such behaviour predicted composition induced metal-semiconductor-metal crossovers accompanied by a change of carriers type. The ZrFe1-xPtxSb and HfFe1-xNixSb samples with x=0.4, 0.5 and 0.6 were synthesised in the C1b structure. The ρ(T) measurements performed in the 80-300K temperature range show a high resistivity with semiconducting-like behaviour (dρ/dT<0) in ZrFe0.5Pt0.5Sb and HfFe0.5Ni0.5Sb. The ρ(T) values are much lower for ZrFe0.6Pt0.4Sb, HfFe0.6Ni0.4Sb and HfFe0.4Ni0.6Sb with dρ/dT∼0. The Seebeck coefficient measured at room temperature changes sign in both series if approaching the x=0.5 composition.
