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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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Effect of octahedron tilt on the structure and magnetic properties of bismuth ferrite

Show Author's information Yang HONGJun LI( )Han BAIZhenjia SONGMing WANGZhongxiang ZHOU( )
School of Physics, Harbin Institute of Technology, Harbin 150001, China

Abstract

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.

Keywords:

bismuth ferrite (BiFeO3), magnetism, octahedron tilt, Raman spectrum, electromagnetic characteristics
Received: 22 April 2020 Revised: 31 May 2020 Accepted: 18 June 2020 Published: 25 September 2020 Issue date: October 2020
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Publication history
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Publication history

Received: 22 April 2020
Revised: 31 May 2020
Accepted: 18 June 2020
Published: 25 September 2020
Issue date: October 2020

Copyright

© The author(s) 2020

Acknowledgements

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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