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Relaxor type perovskites: Primary candidates of nano-polar regions

Krupanidhi, S. B (2007) Relaxor type perovskites: Primary candidates of nano-polar regions. Journal of Chemical Sciences, 115 (5-6). pp. 775-788. ISSN 0973-7103

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Relaxor properties of 0.7Pb(Mg1/3Nb2/3)O3-0.3PbTiO3 (PMN-PT) and non-lead perovskite thin films have been analysed in terms of large frequency dispersion of dielectric response at low temperatures. A wide spectrum of dielectric relaxation was observed in the frequency-dependent response of the imaginary part of the dielectric permittivity. Transformation from normal ferroelectric to relaxor behaviour has been observed in the case of the Ca substituting the BaTiO3 thin films. A number of techniques were exploited to investigate the wide spectrum of relaxation times in pulsed laser ablated thin anddc electric field induced complex dielectric properties of 0.7Pb(Mg1/3Nb2/3)O3-0.3PbTiO3 (PMN-PT) thin films were studied as function of frequencies at different temperatures. Nonlinear behaviour of dielectric susceptibility with respect to the amplitude of theac drive was observed at lower temperatures. The frequency dependence of transition temperatureT m (temperature of the maximum of dielectric constant) was studied using the Vogel-Fulcher relation.

Item Type:Article
Subjects:Material Science > Nanochemistry
Divisions:Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:4091
Deposited By:JNCASR
Deposited On:03 Apr 2009 05:34
Last Modified:03 Apr 2009 05:34

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