Abstract
A series of Er-substituted 0.7Bi1−xErxFeO3-0.3Bi0.5Na0.5TiO3 solid solution samples are prepared by the sol–gel auto-combustion method. The objective of this study is to investigate the effect of Er-substitution on the structural, magnetic, ferroelectric, and leakage properties in the samples. Structural analysis reveals that formation of the samples changes from rhombohedral phase to tetragonal one with increasing x, showing a simultaneous appearance of the two phases near x ~ 0.025. The room temperature ferromagnetism can be significantly improved by the substitution of Bi with Er simultaneously. The x ~ 0.05 sample shows the most significant improvements in ferroelectric response with a modest ferroelectric polarization, highest activation energy, and the lowest leakage current. These results demonstrate that the substitution of Bi with a small amount of Er is beneficial for the simultaneous improvements of ferromagnetic, ferroelectric, and leakage properties in 0.7Bi1−xErxFeO3-0.3Bi0.5Na0.5TiO3 solid solution.
Highlights
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Simultaneous appearance of the R3c and P4bm phases near x ~ 0.025.
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Moderate value of Mr ~ 0.113 emu g−1.
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Leakage current substantially decreased by Er-substitution.
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Chakrabarti, C., Fu, Q., Chen, X. et al. Substitution driven enhancement of ferromagnetic, ferroelectric and leakage properties in multiferroic 0.7Bi1−xErxFeO3-0.3Bi0.5Na0.5TiO3 solid solutions. J Sol-Gel Sci Technol 93, 587–595 (2020). https://doi.org/10.1007/s10971-019-05178-x
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DOI: https://doi.org/10.1007/s10971-019-05178-x