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

研究成果: Article査読

2 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)5658-5664
ページ数7
ジャーナルCeramics International
46
5
DOI
出版ステータスPublished - 2020 4 1

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • セラミックおよび複合材料
  • プロセス化学およびプロセス工学
  • 表面、皮膜および薄膜
  • 材料化学

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