Investigation of structural phase evolution and dielectric response of Co-doped BaTiO3
In the present study, we have synthesized polycrystalline samples of BaTi1−xCoxO3 (BTCO) (x=0, 0.01, 0.03, 0.05, 0.07 and 0.10) with standard solid state reaction technique. The obtained samples are characterized by X-ray diffraction (XRD) and Raman spectroscopy for structural study. The detailed st...
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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/S2010135X18500248 |
| _version_ | 1811267610870808576 |
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| author | Amantulla Mansuri Ilyas Noor Bhatti Imtiaz Noor Bhatti Ashutosh Mishra |
| author_facet | Amantulla Mansuri Ilyas Noor Bhatti Imtiaz Noor Bhatti Ashutosh Mishra |
| author_sort | Amantulla Mansuri |
| collection | DOAJ |
| description | In the present study, we have synthesized polycrystalline samples of BaTi1−xCoxO3 (BTCO) (x=0, 0.01, 0.03, 0.05, 0.07 and 0.10) with standard solid state reaction technique. The obtained samples are characterized by X-ray diffraction (XRD) and Raman spectroscopy for structural study. The detailed structural analysis has been performed by Rietveld refinement using Fullprof program. We observed an increase in lattice parameters, which results due to substitution of Co2+ with large ionic radii (0.9Å) for smaller ionic radii (0.6Å) Ti4+. Moreover, peak at 45.5∘ shifts to 45∘ on Co doping, which is due to structure phase transition from tetragonal to cubic. Raman study infers that the intensity of characteristic peaks decreases and line width increases with Co doping. The bands linked with the tetragonal structure (305cm−1) decreased due to the tetragonal-to-cubic phase transition with Co doping. Our structural study reveals the expansion of BTCO unit cell and tetragonal-to-cubic phase transformation takes place. The results from different characterization techniques are conclusive and show structural evolution with Co doping. The samples are further characterized by dielectric spectroscopy, dielectric measurement reveals the increase of dielectric constant and transition Tc∼125∘C is observed for Barium titanate (BaTiO3), whereas transition disappears with Co doping. Both temperature and frequency-dependent tangent loss is also studied. |
| first_indexed | 2024-04-12T21:05:40Z |
| format | Article |
| id | doaj.art-35cfb08368744c708a6862050c6ed4bb |
| institution | Directory Open Access Journal |
| issn | 2010-135X 2010-1368 |
| language | English |
| last_indexed | 2024-04-12T21:05:40Z |
| publishDate | 2018-08-01 |
| publisher | World Scientific Publishing |
| record_format | Article |
| series | Journal of Advanced Dielectrics |
| spelling | doaj.art-35cfb08368744c708a6862050c6ed4bb2022-12-22T03:16:43ZengWorld Scientific PublishingJournal of Advanced Dielectrics2010-135X2010-13682018-08-01841850024-11850024-610.1142/S2010135X1850024810.1142/S2010135X18500248Investigation of structural phase evolution and dielectric response of Co-doped BaTiO3Amantulla Mansuri0Ilyas Noor Bhatti1Imtiaz Noor Bhatti2Ashutosh Mishra3School of Physics, Devi Ahilya University, Indore 452001, IndiaDepartment of Physics, Jamia Millia Islamia, New Delhi 110025, IndiaSchool of Physical Sciences, Jawaharlal Nehru University, New Delhi 110067, IndiaSchool of Physics, Devi Ahilya University, Indore 452001, IndiaIn the present study, we have synthesized polycrystalline samples of BaTi1−xCoxO3 (BTCO) (x=0, 0.01, 0.03, 0.05, 0.07 and 0.10) with standard solid state reaction technique. The obtained samples are characterized by X-ray diffraction (XRD) and Raman spectroscopy for structural study. The detailed structural analysis has been performed by Rietveld refinement using Fullprof program. We observed an increase in lattice parameters, which results due to substitution of Co2+ with large ionic radii (0.9Å) for smaller ionic radii (0.6Å) Ti4+. Moreover, peak at 45.5∘ shifts to 45∘ on Co doping, which is due to structure phase transition from tetragonal to cubic. Raman study infers that the intensity of characteristic peaks decreases and line width increases with Co doping. The bands linked with the tetragonal structure (305cm−1) decreased due to the tetragonal-to-cubic phase transition with Co doping. Our structural study reveals the expansion of BTCO unit cell and tetragonal-to-cubic phase transformation takes place. The results from different characterization techniques are conclusive and show structural evolution with Co doping. The samples are further characterized by dielectric spectroscopy, dielectric measurement reveals the increase of dielectric constant and transition Tc∼125∘C is observed for Barium titanate (BaTiO3), whereas transition disappears with Co doping. Both temperature and frequency-dependent tangent loss is also studied.http://www.worldscientific.com/doi/pdf/10.1142/S2010135X18500248Oxidesdielectric spectroscopyRaman spectroscopystructural characterization |
| spellingShingle | Amantulla Mansuri Ilyas Noor Bhatti Imtiaz Noor Bhatti Ashutosh Mishra Investigation of structural phase evolution and dielectric response of Co-doped BaTiO3 Journal of Advanced Dielectrics Oxides dielectric spectroscopy Raman spectroscopy structural characterization |
| title | Investigation of structural phase evolution and dielectric response of Co-doped BaTiO3 |
| title_full | Investigation of structural phase evolution and dielectric response of Co-doped BaTiO3 |
| title_fullStr | Investigation of structural phase evolution and dielectric response of Co-doped BaTiO3 |
| title_full_unstemmed | Investigation of structural phase evolution and dielectric response of Co-doped BaTiO3 |
| title_short | Investigation of structural phase evolution and dielectric response of Co-doped BaTiO3 |
| title_sort | investigation of structural phase evolution and dielectric response of co doped batio3 |
| topic | Oxides dielectric spectroscopy Raman spectroscopy structural characterization |
| url | http://www.worldscientific.com/doi/pdf/10.1142/S2010135X18500248 |
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