Abstract
Here we studied the effect of homovalent Pr3+ and Y3+ substitution on the crystal structure, dielectric, electronic polarization and magnetic properties of the BiFeO3 multiferroic ceramic. The samples were synthesized by the conventional solid-state reaction method. Pure phase formation of Pr doped BiFeO3 (BFO) has been obtained, while Y3+ doped BFO has shown a few impurity peaks. It has shown that the crystal structure of the compounds is described within the space group R3c. Pr3+ modified BFO has shown an anomaly in the ε r vs. T plot around and a Néel temperature ‘T N’∼370 ∘C. P–E hysteresis loops have shown higher value of remnant polarization for Pr3+ modified BFO. Magnetic properties of ceramics are determined by the ionic radius of the substituting element. Experimental results propose that the increase in the radius of A-site ion leads to effective suppression of the spiral spin structure of BiFeO3, resulting in the appearance of net magnetization.
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Acknowledgements
We are thankful to Defense Research and Development Organization (DRDO), Government of India, New Delhi for financial support to this work through research project (No.: ERIP/ER/0803744/M/01/1246). One of the authors, Vikash Singh is also thankful to Jaypee Institute of Information Technology for teaching assistance ship.
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Singh, V., Sharma, S., Dwivedi, R.K. et al. Structural, Dielectric, Ferroelectric and Magnetic Properties of Bi0.80A0.20FeO3 (A=Pr,Y) Multiferroics. J Supercond Nov Magn 26, 657–661 (2013). https://doi.org/10.1007/s10948-012-1775-y
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DOI: https://doi.org/10.1007/s10948-012-1775-y