Bajpai, P. K. and Mohan, C. R. K. and Ganjir, Ratnamala and Kumar, Ravi and Kumar, Ashok and Katiyar, R. S. (2018) Swift heavy ion induced material modifications in Ba1-xSrxTiO3 ceramics as probed by temperature-dependent Raman spectroscopy. Journal of Raman Spectroscopy , 49 (2). pp. 324-335. ISSN 0377-0486

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Effect of 100MeV O8+ swift heavy ion (SHI) irradiation on phonon properties of Ba1-xSrxTiO3 (x=0.10, 0.15) ceramics are probed using Raman spectroscopy. Temperature-dependent Raman spectra in the range (100 degrees C to -190 degrees C) have been investigated, and deconvoluted Raman modes parameters are used in pristine and irradiated ceramics to understand the effect of ion irradiation on phonon modes. Raman bands are successfully identified that discern changes in band parameters during transition from cubic tetragonal orthorhombic rhombohedral phases. Raman spectral analysis reveals that the phase transition sequence remains almost unaffected after SHI irradiation; however, band parameters (band positions, band intensity, and line widths) of some phonon modes show changes after SHI irradiation. Results are interpreted in terms of grain reorientation and oxygen vacancies annihilation due to irradiation. Comparisons of ferroelectric properties in pristine and irradiated ceramics unambiguously reveal that surface or near surface material modifications influence the bulk properties of these polar materials.

Item Type: Article
Additional Information: Copyright for this article belongs to M/s John Wiley & Sons.
Subjects: Spectroscopy
Depositing User: Users 27 not found.
Date Deposited: 20 Dec 2019 07:25
Last Modified: 20 Dec 2019 07:25

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