Dielectric, electrical conduction and magnetic properties of multiferroic Bi0.8Tb0.1Ba0.1Fe0.9Ti0.1O3 perovskite compound

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Abstract

This work focuses on the structural, electrical and magnetic properties of Bi0.8Tb0.1Ba0.1Fe0.9Ti0.1O3 ceramics, fabricated by solid state reaction procedure. XRD forms of the samples at RT exhibited perovskite phase through the hexagonal structure at room temperature. Dielectric studies of the materials with frequency at different temperatures (25-400°C) exhibit two dielectric anomalies, first at 175°C (ferroelectric-ferroelectric transition) and second at around 320°C (ferroelectric-paraelectric transition). The Curie temperature moved towards the low side temperature with the increase in frequency. The less value of activation energy got for these samples could be attributed to the influence of electronic contribution to the conductivity. A significant change in the magnetic studies was observed for Bi0.8Tb0.1Ba0.1Fe0.9Ti0.1O3 ceramic. The impedance analysis confirms the non-Debye type nature of the ceramic and relaxation frequency moved to a higher temperature. The Nyquist plot and conductivity studies showed the NTCR behavior of samples. The highest magnetization field was found at temperature −268.15°C.

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Kumari, P., Rai, R., Sharma, S., & Valente, M. A. (2017). Dielectric, electrical conduction and magnetic properties of multiferroic Bi0.8Tb0.1Ba0.1Fe0.9Ti0.1O3 perovskite compound. Journal of Advanced Dielectrics, 7(5). https://doi.org/10.1142/S2010135X17500345

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