Tuning of dielectric and ferroelectric properties in single phase BiFeO3 ceramics with controlled Fe2+/Fe3+ ratio

Shanming Ke; Peng Lin; Xierong Zeng; Haitao Huang; Li Min Zhou; Y. W. Mai

doi:10.1016/j.ceramint.2013.10.098

Tuning of dielectric and ferroelectric properties in single phase BiFeO3 ceramics with controlled Fe2+/Fe3+ ratio

Shanming Ke, Peng Lin, Xierong Zeng, Haitao Huang, Li Min Zhou, Y. W. Mai

Research output: Journal article publication › Journal article › Academic research › peer-review

34 Citations (Scopus)

Abstract

Single phase multiferroic BiFeO3(BFO) ceramics were synthesized with controllable amount of Fe2+and oxygen vacancies in a very wide concentration range. Double ferroelectric hysteresis loops are observed in fresh BFO ceramics at room temperature without any aging processes. Detailed study shows that this is due to the defect dipoles which have preferential orientations antiparallel to the direction of spontaneous polarization, providing a driving force for domain back-switching. The dielectric constant of BFO could be enormously enhanced by 100 times by increasing the Fe2+content, employing a polaronic relaxation process.

Original language	English
Pages (from-to)	5263-5268
Number of pages	6
Journal	Ceramics International
Volume	40
Issue number	4
DOIs	https://doi.org/10.1016/j.ceramint.2013.10.098
Publication status	Published - 1 May 2014

Keywords

Antiferroelectric-like P-E loops
BFO
Oxygen vacancy
Polaronic relaxation

ASJC Scopus subject areas

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

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10.1016/j.ceramint.2013.10.098

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AU - Ke, Shanming

AU - Lin, Peng

AU - Zeng, Xierong

AU - Huang, Haitao

AU - Zhou, Li Min

AU - Mai, Y. W.

PY - 2014/5/1

Y1 - 2014/5/1

N2 - Single phase multiferroic BiFeO3(BFO) ceramics were synthesized with controllable amount of Fe2+and oxygen vacancies in a very wide concentration range. Double ferroelectric hysteresis loops are observed in fresh BFO ceramics at room temperature without any aging processes. Detailed study shows that this is due to the defect dipoles which have preferential orientations antiparallel to the direction of spontaneous polarization, providing a driving force for domain back-switching. The dielectric constant of BFO could be enormously enhanced by 100 times by increasing the Fe2+content, employing a polaronic relaxation process.

AB - Single phase multiferroic BiFeO3(BFO) ceramics were synthesized with controllable amount of Fe2+and oxygen vacancies in a very wide concentration range. Double ferroelectric hysteresis loops are observed in fresh BFO ceramics at room temperature without any aging processes. Detailed study shows that this is due to the defect dipoles which have preferential orientations antiparallel to the direction of spontaneous polarization, providing a driving force for domain back-switching. The dielectric constant of BFO could be enormously enhanced by 100 times by increasing the Fe2+content, employing a polaronic relaxation process.

KW - Antiferroelectric-like P-E loops

KW - BFO

KW - Oxygen vacancy

KW - Polaronic relaxation

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JO - Ceramics International

JF - Ceramics International

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ER -

Tuning of dielectric and ferroelectric properties in single phase BiFeO3 ceramics with controlled Fe2+/Fe3+ ratio

Abstract

Keywords

ASJC Scopus subject areas

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