• Structural, dielectric and electrical properties of Sm-modified Pb(SnTi)O3 ferroelectric system

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    • Keywords

       

      XRD; dielectric permittivity; loss tangent; a.c. conductivity.

    • Abstract

       

      We have synthesized (Pb1–𝑥Sm𝑥)(Sn𝑦Ti1–𝑦)1–𝑥/4O3 (PSmST) polycrystalline ferroelectric ceramics with 𝑥 = 0.05, 0.07, 0.1 and 𝑦 = 0.45 by a solid-state reaction technique and performed preliminary X-ray diffraction (XRD) analysis, detailed temperature and frequency dependence dielectric measurements on them. The a.c. conductivity has been investigated over a wide range of temperature and the activation energy ($E_{a.c.}$) has also been calculated. It is observed that

      1. the dielectric permittivity (𝜀) and loss tangent (tan 𝛿) are dependent on frequency,

      2. the temperature of dielectric permittivity maximum shifts toward lower temperature side with the increase of samarium ion (Sm+3) concentration at the Pb sites, and

      3. observed and calculated 𝑑-values of XRD patterns show that the compounds have been formed in orthorhombic single phase.

    • Author Affiliations

       

      B P Das1 R N P Choudhary2 P K Mahapatra1

      1. Department of Physics, Vidyasagar University, Midnapore 721 102, India
      2. Department of Physics and Meteorology, Indian Institute of Technology, Kharagpur 721 302, India
    • Dates

       
  • Bulletin of Materials Science | News

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