Multifunctional behavior of acceptor-cation substitution at higher doping concentration in PZT ceramics
authors Kumari, N; Monga, S; Arif, M; Sharma, N; Sanger, A; Singh, A; Vilarinho, PM; Gupta, V; Sreenivas, K; Katiyar, RS; Scott, JF
nationality International
journal CERAMICS INTERNATIONAL
author keywords Ferroelectric; Multiferroic; Ceramics; PFZT; XRD; SEM; Dielectric; Magnetization
keywords LEAD-ZIRCONATE-TITANATE; PIEZOELECTRIC PROPERTIES; ELECTRICAL-PROPERTIES; THIN-FILMS; FE; MICROSTRUCTURE; STORAGE; NI
abstract The Fe-doped PZT, Pb (Zr, Ti)(1-x)FexO3, ceramics have gathered plenty of attention because of the interplay of ferroelectric and ferromagnetic properties. In the present study, we report the properties of Pb(Zr0.52Ti0.48)(1-x)FexO3 prepared by conventional solid-state reaction route with varying Fe3+ doping concentrations, x = 0, 0.05, 0.10, 0.15 and 0.20. Study of X-ray diffraction patterns confirmed the tetragonal crystal structure along with reduction in tetragonality and unit-cell size with doping. It also showed formation of secondary magnetoplumbite phase at higher doping concentrations. The SEM micrographs exhibited decrease in grain size with increase in doping concentration (for x > 0.05). The increase in oxygen vacancies and the formation of secondary magneto-plumbite phase and Fe3+-VO2--Fe3+ defect dipole complexes introduced with the acceptor (Fe3+) doping, caused clamping of the domain walls and hence reduced the room temperature dielectric constant as the doping concentration was increased. The coexistence of electrical polarization and magnetic moment at room temperature in all PFZT compositions confirmed the multiferroic characteristic in the ceramic samples. Electric polarization (P-r) and coercive fields (E-c) decreased with increase in Fe3+ concentration in PFZT sample. However, magnetization (M) and magnetic coercive fields (E-c) increased with the increasing Fe3+ concentration due to the dominant effect of F-center exchange mechanism in Fe3+-VO2--Fe3+ and formation of ferromagnetic secondary magneto-plumbite phase.
publisher ELSEVIER SCI LTD
issn 0272-8842
isbn 1873-3956
year published 2019
volume 45
issue 10
beginning page 12716
ending page 12726
digital object identifier (doi) 10.1016/j.ceramint.2019.03.138
web of science category Materials Science, Ceramics
subject category Materials Science
unique article identifier WOS:000469151800013
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journal analysis (jcr 2019):
journal impact factor 3.83
5 year journal impact factor 3.513
category normalized journal impact factor percentile 94.643
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