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Your search keyword '"Prajapat D"' showing total 2 results
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2 results on '"Prajapat D"'

1. Reentrant phenomenon in the diffuse ferroelectric BaSn0.15Ti0.85 O3: Local structural insights and first-order reversal curves study

Author

Surampalli A., Egli R., Prajapat D., Meneghini C., Reddy V. R., Surampalli, A., Egli, R., Prajapat, D., Meneghini, C., and Reddy, V. R.

Subjects
Condensed Matter::Materials Science
Abstract

From the phase diagram proposed by Lei et al. [J. Appl. Phys. 101, 084105 (2007)JAPIAU0021-897910.1063/1.2715522], BaSn0.15Ti0.85O3 is chosen. It also exhibits a diffuse phase transition between cubic and rhombohedral (C-R) near room temperature. Dielectric analysis confirms a phase transition near room temperature (TC≈290 K). In addition, frequency dispersion in the dielectric constant, concomitantly, a loss peak is observed at low temperatures (T

Published
2021

2. Lattice assisted dielectric relaxation in four-layer Aurivillius Bi5FeTi3O15 ceramic at low temperatures

Author

S. D. Kaushik, Irene Schiesaro, Archna Sagdeo, Vasudeva Siruguri, Edmund Welter, Vasant Sathe, V. Raghavendra Reddy, Akash Surampalli, Deepak Prajapat, Carlo Meneghini, Prajapat, D., Surampalli, A., Schiesaro, I., Kaushik, S. D., Meneghini, C., Sagdeo, A., Sathe, V. G., Siruguri, V., Welter, E., and Reddy, V. R.

Subjects
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
Abstract

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.

Published
2021
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