Enhanced electromagnetic properties and microwave attenuation of BiFeO3-BaFe7(MnTi)2.5O19 driven by multi-relaxation and strong ferromagnetic resonance

Yong Li, Maosheng Cao*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)

Abstract

We report the original observation of the electromagnetic properties and microwave attenuation performances of BiFeO3-BaFe7(MnTi)2.5O19 composites in X-band. It is found that the permittivity of BiFeO3-BaFe7(MnTi)2.5O19 shows dielectric multi-relaxation behavior, which plays an important role in maintaining the high dielectric loss. Meanwhile, BiFeO3-BaFe7(MnTi)2.5O19 exhibits increased magnetic loss due to strong ferromagnetic resonance. For all BiFeO3-BaFe7(MnTi)2.5O19 composites, the minimum reflection loss surpasses − 20 dB. Especially, the minimum reflection loss of the composites with volume ratio of 2:1 and 3:1 reaches − 50 dB, which is almost 3 times of that of BiFeO3. The enhanced microwave attenuation is attributed to the improved electromagnetic properties and electromagnetic matching. This work opens up a promising feasible route to development of microwave attenuation materials in imaging, healthcare, information safety and military fields.

Original languageEnglish
Pages (from-to)99-104
Number of pages6
JournalMaterials and Design
Volume110
DOIs
Publication statusPublished - 15 Nov 2016

Keywords

  • BaFe(MnTi)O
  • BiFeO
  • Electromagnetic properties
  • Ferromagnetic resonance
  • Microwave attenuation
  • Multi-relaxation

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