Journal of Chemical Sciences

, Volume 115, Issue 5–6, pp 775–788

Relaxor type perovskites: Primary candidates of nano-polar regions

  • S. B. Krupanidhi

DOI: 10.1007/BF02708267

Cite this article as:
Krupanidhi, S.B. J Chem Sci (2003) 115: 775. doi:10.1007/BF02708267


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 temperatureTm (temperature of the maximum of dielectric constant) was studied using the Vogel-Fulcher relation.


Relaxor PMN-PT BCT PLD Vogel-Fulcher 

Copyright information

© Indian Academy of Sciences 2003

Authors and Affiliations

  • S. B. Krupanidhi
    • 1
  1. 1.Materials Research CentreIndian Institute of ScienceBangaloreIndia

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