Abstract
Multiferroic BiFe0.95Ti0.05O3 (BFTO) powders were synthesized by sol–gel method, and then compacted by spark plasmas sintering (SPS) at 650 °C. Analysis of structure and morphology suggested the formation of a distorted rhombohedral in BFTO ceramics with a homogeneous distribution in grain sizes. BFTO ceramics revealed electric homogenous properties verified from the plots of complex impedance versus frequency. The contribution of oxygen vacancies in the behaviors of dielectric and ac conductivity was analyzed. At high temperature (473 K), the dielectric relaxation and ac conductivity were mainly attributed to the motion of oxygen vacancies. Do** of Ti4+ in BiFeO3 ceramics showed a high remanent magnetization due to the structural evolution and the broken of the spiral magnetic ordering in BiFeO3 system.
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Acknowledgements
This work was supported by the Project of Department of Education (GJJ180982) and National Natural Science Foundation of China (No. 61504078). We acknowledge the assistance by the Analytical and Testing Center of Huazhong University of Science and Technology.
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Tian, Y., Xue, F. Impedance spectrum and magnetic properties of BiFe0.95Ti0.05O3 ceramics. J Mater Sci: Mater Electron 30, 15452–15459 (2019). https://doi.org/10.1007/s10854-019-01921-w
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DOI: https://doi.org/10.1007/s10854-019-01921-w