Chemically engineered multiferroic morphotropic phase boundary in BiFeO3-based single phase multiferroics

As the reach points of different phases with complex structural features, a morphotropic phase boundary (MPB) in ferroelectric and ferromagnetic solid solutions can significantly enhance the piezoelectric performance and magnetostrictive response, respectively. Recently, the phase-change functional...

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Bibliographic Details
Published in:Journal of applied physics 2019-01, Vol.125 (4)
Main Authors: Zhuang, Jian, Lu, Jinming, Zhang, Nan, Zhang, Jie, Bokov, Alexei A., Yang, Shuming, Ren, Wei, Ye, Zuo-Guang
Format: Article
Language:English
Subjects:
Applied physics
Bismuth ferrite
Composition
Coupling
Crystal structure
Ferroelectric materials
Ferroelectricity
Ferromagnetism
High temperature
Ions
Lead titanates
Magnetostriction
Multiferroic materials
Organic chemistry
Phase boundaries
Phase change
Phase diagrams
Phase transitions
Piezoelectricity
Solid solutions
Ternary systems
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Summary:As the reach points of different phases with complex structural features, a morphotropic phase boundary (MPB) in ferroelectric and ferromagnetic solid solutions can significantly enhance the piezoelectric performance and magnetostrictive response, respectively. Recently, the phase-change functional responses related to the multiferroic MPB are proposed to be a promising way to enhance the magnetoelectric coupling in BiFeO3-based single phase multiferroics. In this work, we verify the tunable magnetic ordering and the construction of the multiferroic MPB by engineering the chemical concentrations of the ferroelectric/non-magnetic PbTiO3 end in the (1 – x)Bi0.9Dy0.1FeO3-xPbTiO3 binary solid solution ceramic system. Based on the results obtained in this work and reported in the literature, the structure-ferroic properties phase diagram of the BiFeO3-DyFeO3-PbTiO3 ternary system is established, where a compositional region with coexisting ferroelectric polarization and ferromagnetic moment is found. More importantly, a multiferroic MPB line separating two chemical regions with distinct crystal structures and ferroic orderings is discovered in the phase diagram. The phase changing nature of MPB compositions with temperature and compositions is investigated from room temperature to high temperature paraelectric phase. This work could provide a promising system to explore the highly desired colossal effects on magnetoelectric coupling in single phase multiferroics by phase-change functional responses.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.5054674