Octahedral distortion-driven electrical and vibrational properties of A2ErTaO6 (A=Sr and Ca) double perovskite oxides
Rietveld refinement analysis indicates that A2ErTaO6 (A=Sr+2, Ca+2) ceramics prepared by a solid-state route are crystallized in monoclinic perovskite phase with space group P21∕n. Raman scattering and infrared spectroscopy are used to investigate the structure and phonon modes of the samples. Using...
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| Format: | Article |
| Language: | English |
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World Scientific Publishing
2018-08-01
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| Series: | Journal of Advanced Dielectrics |
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| Online Access: | http://www.worldscientific.com/doi/pdf/10.1142/S2010135X1850025X |
| _version_ | 1818298336321470464 |
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| author | Rajesh Mukherjee Alo Dutta T. P. Sinha |
| author_facet | Rajesh Mukherjee Alo Dutta T. P. Sinha |
| author_sort | Rajesh Mukherjee |
| collection | DOAJ |
| description | Rietveld refinement analysis indicates that A2ErTaO6 (A=Sr+2, Ca+2) ceramics prepared by a solid-state route are crystallized in monoclinic perovskite phase with space group P21∕n. Raman scattering and infrared spectroscopy are used to investigate the structure and phonon modes of the samples. Using Lorentzian lines, we have fitted the Raman spectra and the major Raman modes are assigned. Phonon vibrational frequency is modulated with the A-site cationic change. Impedance spectra of the samples over the frequency range of 100Hz–1.1MHz are investigated at different temperatures from 303K to 573K. Cole–Cole relaxation of dielectric constant is modified with the electrical conduction parameter to describe the temperature dependence of dielectric constant. The frequency-dependent conductivity spectra follow the double power-law. |
| first_indexed | 2024-12-13T04:33:42Z |
| format | Article |
| id | doaj.art-134dc9fbee894046b9686477bc8bc762 |
| institution | Directory Open Access Journal |
| issn | 2010-135X 2010-1368 |
| language | English |
| last_indexed | 2024-12-13T04:33:42Z |
| publishDate | 2018-08-01 |
| publisher | World Scientific Publishing |
| record_format | Article |
| series | Journal of Advanced Dielectrics |
| spelling | doaj.art-134dc9fbee894046b9686477bc8bc7622022-12-21T23:59:29ZengWorld Scientific PublishingJournal of Advanced Dielectrics2010-135X2010-13682018-08-01841850025-11850025-810.1142/S2010135X1850025X10.1142/S2010135X1850025XOctahedral distortion-driven electrical and vibrational properties of A2ErTaO6 (A=Sr and Ca) double perovskite oxidesRajesh Mukherjee0Alo Dutta1T. P. Sinha2Department of Physics, Ramananda College, Bishnupur, Bankura 722122, West Bengal, IndiaDepartment of Condensed Matter Physics and Material Sciences, S. N. Bose National Centre for Basic Sciences, Block-JD, Sector-III, Salt Lake, Kolkata 700098, West Bengal, IndiaDepartment of Physics, Bose Institute, 93/1 Acharya Prafulla Chandra Road, Kolkata 700009, West Bengal, IndiaRietveld refinement analysis indicates that A2ErTaO6 (A=Sr+2, Ca+2) ceramics prepared by a solid-state route are crystallized in monoclinic perovskite phase with space group P21∕n. Raman scattering and infrared spectroscopy are used to investigate the structure and phonon modes of the samples. Using Lorentzian lines, we have fitted the Raman spectra and the major Raman modes are assigned. Phonon vibrational frequency is modulated with the A-site cationic change. Impedance spectra of the samples over the frequency range of 100Hz–1.1MHz are investigated at different temperatures from 303K to 573K. Cole–Cole relaxation of dielectric constant is modified with the electrical conduction parameter to describe the temperature dependence of dielectric constant. The frequency-dependent conductivity spectra follow the double power-law.http://www.worldscientific.com/doi/pdf/10.1142/S2010135X1850025XRare-earth double perovskitedielectric relaxationRaman spectroscopyelectrical conductivity |
| spellingShingle | Rajesh Mukherjee Alo Dutta T. P. Sinha Octahedral distortion-driven electrical and vibrational properties of A2ErTaO6 (A=Sr and Ca) double perovskite oxides Journal of Advanced Dielectrics Rare-earth double perovskite dielectric relaxation Raman spectroscopy electrical conductivity |
| title | Octahedral distortion-driven electrical and vibrational properties of A2ErTaO6 (A=Sr and Ca) double perovskite oxides |
| title_full | Octahedral distortion-driven electrical and vibrational properties of A2ErTaO6 (A=Sr and Ca) double perovskite oxides |
| title_fullStr | Octahedral distortion-driven electrical and vibrational properties of A2ErTaO6 (A=Sr and Ca) double perovskite oxides |
| title_full_unstemmed | Octahedral distortion-driven electrical and vibrational properties of A2ErTaO6 (A=Sr and Ca) double perovskite oxides |
| title_short | Octahedral distortion-driven electrical and vibrational properties of A2ErTaO6 (A=Sr and Ca) double perovskite oxides |
| title_sort | octahedral distortion driven electrical and vibrational properties of a2ertao6 a sr and ca double perovskite oxides |
| topic | Rare-earth double perovskite dielectric relaxation Raman spectroscopy electrical conductivity |
| url | http://www.worldscientific.com/doi/pdf/10.1142/S2010135X1850025X |
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