Lattice assisted dielectric relaxation in four-layer Aurivillius Bi5FeTi3O15 ceramic at low temperatures
| Autor: | S. D. Kaushik, Irene Schiesaro, Archna Sagdeo, Vasudeva Siruguri, Edmund Welter, Vasant Sathe, V. Raghavendra Reddy, Akash Surampalli, Deepak Prajapat, Carlo Meneghini |
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| Přispěvatelé: | Prajapat, D., Surampalli, A., Schiesaro, I., Kaushik, S. D., Meneghini, C., Sagdeo, A., Sathe, V. G., Siruguri, V., Welter, E., Reddy, V. R. |
| Rok vydání: | 2021 |
| Předmět: |
four layer Aurivillius compound
Materials science Extended X-ray absorption fine structure biology Magnetism Mossbauer spectroscopy Neutron diffraction Relaxation (NMR) Analytical chemistry Dielectric dielectric relaxation Atmospheric temperature range Condensed Matter Physics biology.organism_classification Aurivillius EXAFS symbols.namesake neutron diffraction Raman spectroscopy symbols General Materials Science |
| Zdroj: | Journal of Physics: Condensed Matter. 33:355803 |
| ISSN: | 1361-648X 0953-8984 |
| DOI: | 10.1088/1361-648x/ac0c3b |
| Popis: | We have investigated magnetic, structural and dielectric properties of Bi5FeTi3O15 (BFTO) in the temperature range 5K-300 K. Using diffraction, Raman spectroscopy and x-ray absorption fine structure measurements, iso-structural modifications are observed at low temperatures (≈100 K). The analysis of dielectric constant data revealed signatures of dielectric relaxation, concomitant with these structural modifications in BFTO at the same temperatures. Further, employing complementary experimental methods, it is shown that the distribution of Fe/Ti ions in BFTO is random. With the help of techniques that probe magnetism at various length and time scales, it is shown that the phase-pure BFTO is non-magnetic down to the lowest temperatures. |
| Databáze: | OpenAIRE |
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