Modulations in relaxor nature due to Sr2+ doping in 0.68PMN-0.32PT ceramic

Pius Augustine, Muralidhar Miryala, Shibnath Samanta, S. Pavan Kumar Naik, K. Sethupathi, Masato Murakami, M. S. Ramachandra Rao

Research output: Contribution to journalArticlepeer-review

Abstract

Substitution of alkali earth metal ion of Sr2+, in the Pb2+ site of Pb(Mg1/3Nb2/3)O3–PbTiO3 is expected to induce functional modulations in the system. Doping of 4 at.% of Sr2+ in 0.68PMN-0.32PT was carried out to lower the transition temperature, and to investigate the intended ferroelectric and dielectric variations. Excellent relaxor property was observed in the doped sample without appreciable reduction in remnant polarization. Doping with Sr2+ led to a reduction in transition temperature from 165 °C to 117 °C. Doped sample exhibited remnant polarization Pr = 16.2 μC/cm2, Squareness factor (Rsq) = 1.05 and Relaxor exponent (γ) around 2. Modulation in the functional response was exhibited by the doped composition, having low transition temperature, and its prospect in electrocaloric applications was analyzed.

Original languageEnglish
Pages (from-to)5658-5664
Number of pages7
JournalCeramics International
Volume46
Issue number5
DOIs
Publication statusPublished - 2020 Apr 1

Keywords

  • Dielectric properties
  • Ferroelectric properties
  • Functional applications
  • Perovskites

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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