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Influence of iron deficiency on electric and magnetic behavior of Ho doped BiFeO3 electroceramic

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Abstract

The effect of iron deficiency for the improvement of multiferroic properties of Ho doped BiFeO3 ceramics (BiHoXFe1−XO3 for x = 0, 0.05, 0.1 and 0.15) prepared by conventional solid state reaction route were investigated carefully. As pure BiFeO3 exhibited antiferromagnetism, lossy ferroelectric (P–E) hysteresis loop and low dielectric constant value so, device integration is significantly hindered due to the presence of impurity phases associated with it. However, suitable variation of metal ion concentration in Ho doped BiFeO3 significantly enhanced both ferroelectric and ferromagnetic properties of the samples. Therefore, increase of Ho concentration certainly favors for suppression of impurity phases in rhombohedral (R3c) structure of BiFeO3 along with no structural transformation. On the other hand, increase of iron deficiency may suppress transformation of Fe from Fe3+ to Fe2+ as a result, the dielectric constant value of the sample increases along with large reduction of leakage current behavior.

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Acknowledgments

Author Sangram K. Pradhan gratefully acknowledged the research facilities received from Institute of Materials Science, Bhubaneswar and financial support received from CSIR, New Delhi (Sanction No. 9/750 (0006)/12 EMR-I). Author also thanks to Mr. S. Choudhury of IOP, Bhubaneswar for XPS measurement.

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  1. Institute of Materials Science, Planetarium Building, Acharya Vihar, Bhubaneswar, 751013, Odisha, India

    S. K. Pradhan

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Pradhan, S.K. Influence of iron deficiency on electric and magnetic behavior of Ho doped BiFeO3 electroceramic. J Mater Sci: Mater Electron 24, 1720–1726 (2013). https://doi.org/10.1007/s10854-012-1003-3

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