Abstract
In this study, phase formation and the magnetic properties of bismuth ferrite–lead titanate multiferroic composites were investigated. Multiferroic composites consisting of antiferromagnetic bismuth ferrite (BiFeO3 or BF) and ferroelectric lead titanate (PbTiO3 or PT) were synthesized by the solid-state sintering method. The presence of pure phase in these composites was confirmed by X-ray diffraction (XRD). The microstructure and magnetic properties were investigated by means of a scanning electron microscope (SEM) and vibrating sample magnetometer (VSM), respectively. Structural transformation from rhombohedral in pure BF to mixed-phase between rhombohedral and tetragonal when added with 50 wt% PT has been revealed from XRD analysis. The magnetic properties are generally seen to reduce with an increase in the content of the PT phase. Interestingly, the M–H hysteresis loop measurements indicated that the composites exhibited superparamagnetic behavior at room temperature for all compositions, a noticeable contradiction to the magnetic behavior earlier reported for the BF–PT solid–solution.
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Acknowledgements
The authors would like to thank the Thailand Research Fund (TRF) and Faculty of Science of Maejo University for their financial support. Also acknowledged for additional technical support is the Processing Technology of Materials Research Laboratory (PTMRL).
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Wongmaneerung, R., Jantaratana, P., Yimnirun, R. et al. Phase Formation and Magnetic Properties of Bismuth Ferrite–Lead Titanate Multiferroic Composites. J Supercond Nov Magn 26, 371–379 (2013). https://doi.org/10.1007/s10948-012-1733-8
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DOI: https://doi.org/10.1007/s10948-012-1733-8