Szczegóły publikacji
Opis bibliograficzny
Structure and transport properties of the novel $(Dy,Er,Gd,Ho,Y)_3Fe_5O_{12}$ and $(Dy,Gd,Ho,Sm,Y)_3Fe_5O_{12}$ high entropy garnets / Juliusz DĄBROWA, Jakub CIEŚLAK, Marek ZAJUSZ, Maciej MOŹDZIERZ, Katarzyna BERENT, Andrzej MIKUŁA, Anna STĘPIEŃ, Konrad ŚWIERCZEK // Journal of the European Ceramic Society ; ISSN 0955-2219. — Tytuł poprz.: International Journal of High Technology Ceramics. — 2021 — vol. 41 iss. 6, s. 3844–3849. — Bibliogr. s. 3849, Abstr. — Publikacja dostępna online od: 2021-01-04. — K. Świerczek - dod. afiliacja: CE
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Dane bibliometryczne
| ID BaDAP | 133600 |
|---|---|
| Data dodania do BaDAP | 2021-04-26 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.jeurceramsoc.2020.12.052 |
| Rok publikacji | 2021 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Journal of the European Ceramic Society |
Abstract
High-entropy, iron-containing, garnet-structured oxides with (Dy,Er,Gd,Ho,Y)3Fe5O12 and (Dy,Gd,Ho,Sm,Y)3Fe5O12 compositions are synthesized for the first time. A modified Pechini method followed by calcination at 700 °C and sintering at 1300 °C enables obtaining single-phase, homogenous materials of cubic structure with Ia-3d symmetry. High-temperature in-situ X-ray diffraction studies show excellent phase stability of the garnets, as well as moderate thermal expansion coefficient, ca. 11·10−6 K-1 in 25−1000 °C temperature range. Raman spectroscopy measurements indicate the presence of local distortion of structural polyhedra, likely associated with the high-entropy effect. The collected Mossbauer spectra confirm distorted character of the lattice. Influenced by the presence of Fe3+ in locally distorted octahedra and tetrahedra, the electrical conduction at low temperatures of both oxides remains much lower comparing to Y3Fe5O12 (yttrium iron garnet - YIG), as well as to other rare-earth garnets up to 600 °C, where it reaches value similar to YIG. © 2020