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

doi:10.1002/pssa.201800584

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 journal › Article

Abstract

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 (Bi_12.5Fe_0.5O_19.48/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 language	English
Article number	1800584
Journal	Physica Status Solidi (A) Applications and Materials Science
Volume	216
Issue number	3
DOIs	https://doi.org/10.1002/pssa.201800584
Publication status	Published - Feb 6 2019

Keywords

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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Monteduro, A. G., Rizzato, S., Leo, C., Karmakar, S., Sirsi, F., Leo, A., Tasco, V., Esposito, M., Passaseo, A., Caricato, A. P., Martino, M., & Maruccio, G. (2019). Dielectric and Ferroelectric Response of Multiphase Bi-Fe-O Ceramics. Physica Status Solidi (A) Applications and Materials Science, 216(3), [1800584]. https://doi.org/10.1002/pssa.201800584

Dielectric and Ferroelectric Response of Multiphase Bi-Fe-O Ceramics. / Monteduro, Anna Grazia; Rizzato, Silvia; Leo, Chiara; Karmakar, Shilpi; Sirsi, Fausto; Leo, Angelo; Tasco, Vittorianna; Esposito, Marco; Passaseo, Adriana; Caricato, Anna Paola; Martino, Maurizio; Maruccio, Giuseppe.

In: Physica Status Solidi (A) Applications and Materials Science, Vol. 216, No. 3, 1800584, 06.02.2019.

Research output: Contribution to journal › Article

Monteduro, Anna Grazia ; Rizzato, Silvia ; Leo, Chiara ; Karmakar, Shilpi ; Sirsi, Fausto ; Leo, Angelo ; Tasco, Vittorianna ; Esposito, Marco ; Passaseo, Adriana ; Caricato, Anna Paola ; Martino, Maurizio ; Maruccio, Giuseppe. / Dielectric and Ferroelectric Response of Multiphase Bi-Fe-O Ceramics. In: Physica Status Solidi (A) Applications and Materials Science. 2019 ; Vol. 216, No. 3.

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abstract = "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.",

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