Structural response of Aurivillius Bi5Ti3FeO15 to A-site substitution with Te4+ and Hf4+ ions
Materiały konferencyjne
MNiSW
40
Lista 2024
| Status: | |
| Autorzy: | Siedliska Karolina, Gondek Łukasz, Pikula Tomasz |
| Dyscypliny: | |
| Aby zobaczyć szczegóły należy się zalogować. | |
| Rok wydania: | 2026 |
| Wersja dokumentu: | Drukowana | Elektroniczna |
| Język: | angielski |
| Wolumen/Tom: | 247 |
| Numer artykułu: | 114 |
| Strony: | 1 - 9 |
| Efekt badań statutowych | NIE |
| Materiał konferencyjny: | TAK |
| Nazwa konferencji: | 38th International Conference on the Applications of the Mössbauer Effect and the International Conference on Hyperfine Interactions and Their Applications |
| Skrócona nazwa konferencji: | 38th ICAME & HYPERFINE |
| URL serii konferencji: | LINK |
| Termin konferencji: | 7 września 2025 do 12 września 2025 |
| Miasto konferencji: | Gdańsk |
| Państwo konferencji: | POLSKA |
| Publikacja OA: | NIE |
| Abstrakty: | angielski |
| he structural response of Aurivillius Bi5Ti3FeO15 (BTFO) to A-site substitution with tet- ravalent cations (Hf4+ and Te4+) was investigated as a strategy to increase the Fe concen- tration within the perovskite-like layers and enhance the magnetic response of the mate- rial. Samples with the nominal composition Bi5−yMyTi3−yFe1+yO15 (M = Hf4+, Te4+) were synthesized via the sol–gel method and characterized by X-ray diffraction (XRD) and 57Fe Mössbauer spectroscopy. Hf substitution did not stabilize the targeted m = 4 Aurivil- lius phase but instead promoted a higher-layer m = 6 analogue (Bi7Ti3Fe3O21), alongside Bi2Ti2O7 pyrochlore and α-Fe2O3. In contrast, Te substitution fully suppressed Aurivillius phase formation, yielding Bi2Ti2O7 pyrochlore and Bi2TeO5 fluorite, with all Fe3+ incorpo- rated into these structures, without the formation of secondary iron oxides. These results demonstrate that A-site donor substitution with Hf4+ and Te4+ ions is not an effective strategy for increasing the Fe content within the Bi5Ti3FeO15 lattice. Instead, the system minimizes its free energy and realizes charge compensation through phase segregation or structural decomposition. |
