Dielectric and Ferroelectric Response of Multiphase Bi-Fe-O Ceramics

Anna Grazia Monteduro, Silvia Rizzato, Chiara Leo, Shilpi Karmakar, Fausto Sirsi, Angelo Leo, Vittorianna Tasco, Marco Esposito, Adriana Passaseo, Anna Paola Caricato, Maurizio Martino, Giuseppe Maruccio

Research output: Contribution to journalArticlepeer-review


The structural, dielectric, and ferroelectric characterization of multiphase Bi-Fe-O prepared with an excess of Bi up to 20% is reported. It is found that the dominant phase in all samples is the BiFeO3 perovskite in addition to an increasing amount of the Bi-rich sillenite phases (Bi12.5Fe0.5O19.48/Bi25FeO39) with the Bi excess content. At room temperature, the multiphase Bi-Fe-O results in advanced electrical properties, with higher dielectric constant (161 at 1 MHz) and low losses (tanδ = 0.032 at 1 MHz). The ferroelectric character of multiphase ceramics is confirmed by PUND measurements, which shows increased polarization values and coercive field with respect to the single phase ceramics.

Original languageEnglish
Article number1800584
JournalPhysica Status Solidi (A) Applications and Materials Science
Issue number3
Publication statusPublished - Feb 6 2019


  • bismuth ferrite
  • dielectric characterization
  • impurity phases
  • multiferroics
  • PUND ferroelectric characterization

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Electrical and Electronic Engineering
  • Materials Chemistry


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