Please use this identifier to cite or link to this item:
https://hdl.handle.net/10356/105833
Title: | Effect of NiO substitution on the structural and dielectric behaviour of NaNbO3 | Authors: | Tiwari, Nidhi George, R. T. Joshi, D. C. Nayak, S. Chauhan, R. N. Pramanik, P. Dar, T. A. Ghosh, S. Thota, S. |
Keywords: | Ceramics Antiferroelectricity DRNTU::Science::Chemistry |
Issue Date: | 2018 | Source: | George, R. T., Joshi, D. C., Nayak, S., Tiwari, N., Chauhan, R. N., Pramanik, P., . . . Thota, S. (2018). Effect of NiO substitution on the structural and dielectric behaviour of NaNbO3. Journal of Applied Physics, 123(5), 054101-. doi:10.1063/1.5013643 | Series/Report no.: | Journal of Applied Physics | Abstract: | The structural and dielectric properties of NiO substituted NaNbO3 ceramics are reported. The orthorhombic (Pmna) crystal structure of NaNbO3 transforms to a lower symmetry monoclinic phase (Pbma) after the dilute dispersion of NiO. X-ray photoelectron spectroscopy reveals pentavalent “Nb,” monovalent “Na,” and divalent “Ni” states along with the signatures of non-local screening effects. The antiferroelectric to paraelectric transition (TAFE) accompanied by a structural change from the orthorhombic to the tetragonal phase shifts by 55 C toward the low-temperature side, whereas the morphotropic phase boundary (TO-M) moves toward a higher temperature by 28 C for nominal substitutions (x 0:10). The generalized Lyddane-Sachs-Teller expression e0 S0e1 ¼ ðxlxtÞ2 and thermodynamic free energy models are employed to explain the anomalous behaviour of the temperature dependence of relative dielectric permittivity (er(T)) across TAFE and TO-M. The frequency dependence of ac-conductivity rac(x) follows the Jonscher power law (rac ¼ r(0) þ Axs), suggesting the dominance of the phonon-assisted hopping mechanism, whereas the frequency independent term (r(0)) was explained by Funke’s Jump-Relaxation Model. | URI: | https://hdl.handle.net/10356/105833 http://hdl.handle.net/10220/48778 |
ISSN: | 0021-8979 | DOI: | 10.1063/1.5013643 | Research Centres: | Energy Research Institute @ NTU (ERI@N) | Rights: | © 2018 The Author(s). All rights reserved. This paper was published by AIP Publishing in Journal of Applied Physics and is made available with permission of The Author(s). | Fulltext Permission: | open | Fulltext Availability: | With Fulltext |
Appears in Collections: | ERI@N Journal Articles |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Effect of NiO substitution on the structural and dielectric .pdf | 7.6 MB | Adobe PDF | View/Open |
SCOPUSTM
Citations
20
14
Updated on Mar 20, 2024
Web of ScienceTM
Citations
20
14
Updated on Oct 30, 2023
Page view(s) 50
489
Updated on Mar 27, 2024
Download(s) 50
88
Updated on Mar 27, 2024
Google ScholarTM
Check
Altmetric
Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.