Please use this identifier to cite or link to this item: https://dspace.iiti.ac.in/handle/123456789/7619
Title: Investigation of la and Al substitution on the spontaneous polarization and lattice dynamics of the Pb(1-x)LaxTi(1-x)AlxO3 ceramics
Authors: Verma, Anita
Kumar, Sunil
Sen, Somaditya
Keywords: Crystal lattices;Digital storage;Electric fields;Field emission microscopes;Polarization;Rietveld analysis;Scanning electron microscopy;Sol-gel process;X ray diffraction;X ray powder diffraction;X ray spectrometers;Chemical compositions;Energy dispersive x-ray spectrometers;Energy storage efficiencies;Field emission scanning electron microscopy;Powder X ray diffraction;Spontaneous polarizations;Synchrotron X ray powder diffraction;Temperature dependent;Spectrometers
Issue Date: 2018
Publisher: American Institute of Physics Inc.
Citation: Yadav, A. K., Verma, A., Kumar, S., Srihari, V., Sinha, A. K., Reddy, V. R., . . . Sen, S. (2018). Investigation of la and al substitution on the spontaneous polarization and lattice dynamics of the pb(1-x)LaxTi(1-x)AlxO3 ceramics. Journal of Applied Physics, 123(12) doi:10.1063/1.5017765
Abstract: The phase purity and crystal structure of Pb(1-x)LaxTi(1-x)AlxO3 (0 ≤ x ≤ 0.25) samples (synthesized via the sol-gel process) were confirmed using synchrotron x-ray powder diffraction (XRD) (wavelength, λ = 0.44573 Å). Rietveld analyses of powder x-ray diffraction data confirmed the tetragonal structure for compositions with x ≤ 0.18 and cubic structure for the sample with x = 0.25. Temperature-dependent XRD was performed to investigate the structural change from tetragonal to cubic structure phase transition. Raman spectroscopy at room temperature also confirmed this phase transition with compositions. Field emission scanning electron microscopy (FESEM) provided information about the surface morphology while an energy dispersive x-ray spectrometer attached with FESEM confirmed the chemical compositions of samples. Temperature and frequency dependent dielectric studies showed that the tetragonal to cubic phase transition decreased from 680 K to 175 K with an increase in the x from 0.03 to 0.25, respectively. This is correlated with the structural studies. Electric field dependent spontaneous polarization showed a proper ferroelectric loop for 0.06 ≤ x ≤ 0.18 belonging to a tetragonal phase, while for x ≥ 0.25, the spontaneous polarization vanishes. Bipolar strain versus electric field revealed a butterfly loop for 0.06 ≤ x ≤ 0.18 compositions. Energy storage efficiency initially increases nominally with substitution but beyond x = 0.18 enhances considerably. © 2018 Author(s).
URI: https://doi.org/10.1063/1.5017765
https://dspace.iiti.ac.in/handle/123456789/7619
ISSN: 0021-8979
Type of Material: Journal Article
Appears in Collections:Department of Metallurgical Engineering and Materials Sciences

Files in This Item:
There are no files associated with this item.


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Altmetric Badge: