Multiferroic BiFeO3-based ceramics were synthesized using the rapid liquid-phase sintering method. The rare-earth ion (Sm3+, Gd3+, Y3+) doping causes structural distortion without changing the intrinsic rhombohedral perovskite structure. Raman analysis shows that the effect of doping on E modes is greater than A1 modes, and the microstructure of FeO6 octahedron can be regulated by ion doping. A-site trivalent ion doped ceramics exhibit improved magnetism compared with pure BiFeO3 ceramic, which originated from the suppressed spiral spin structure of Fe ions. The tilt of FeO6 octahedron as a typical structure instability causes the anomalous change of the imaginary part of permittivity at high frequency, and doped ceramics exhibit natural resonance around 16–17 GHz.
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This study was supported by the National Natural Science Foundation of China (51502054), the Postdoctoral Science Foundation of China (2014M551236), and the Postdoctoral Science Foundation of Heilongjiang Province (LBH-Z14083).
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Hong, Y., Li, J., Bai, H. et al. Effect of octahedron tilt on the structure and magnetic properties of bismuth ferrite. J Adv Ceram 9, 641–646 (2020). https://doi.org/10.1007/s40145-020-0398-1
- bismuth ferrite (BiFeO3)
- octahedron tilt
- Raman spectrum
- electromagnetic characteristics