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Interface-induced dual-pinning mechanism enhances low-frequency electromagnetic wave loss

Author

Listed:
  • Bo Cai

    (Beihang University)

  • Lu Zhou

    (Beihang University)

  • Pei-Yan Zhao

    (Beihang University)

  • Hua-Long Peng

    (Beihang University)

  • Zhi-Ling Hou

    (Beijing University of Chemical Technology)

  • Pengfei Hu

    (Beihang University)

  • Li-Min Liu

    (Beihang University)

  • Guang-Sheng Wang

    (Beihang University)

Abstract

Improving the absorption of electromagnetic waves at low-frequency bands (2-8 GHz) is crucial for the increasing electromagnetic (EM) pollution brought about by the innovation of the fifth generation (5G) communication technology. However, the poor impedance matching and intrinsic attenuation of material in low-frequency bands hinders the development of low-frequency electromagnetic wave absorbing (EMWA) materials. Here we propose an interface-induced dual-pinning mechanism and establish a magnetoelectric bias interface by constructing bilayer core-shell structures of NiFe2O4 (NFO)@BiFeO3 (BFO)@polypyrrole (PPy). Such heterogeneous interface could induce distinct magnetic pinning of the magnetic moment in the ferromagnetic NFO and dielectric pinning of the dipole rotation in PPy. The establishment of the dual-pinning effect resulted in optimized impedance and enhanced attenuation at low-frequency bands, leading to better EMWA performance. The minimum reflection loss (RLmin) at thickness of 4.43 mm reaches -65.30 dB (the optimal absorption efficiency of 99.99997%), and the effective absorption bandwidth (EAB) can almost cover C-band (4.72 ~ 7.04 GHz) with low filling of 15.0 wt.%. This work proposes a mechanism to optimize low-frequency impedance matching with electromagnetic wave (EMW) loss and pave an avenue for the research of high-performance low-frequency absorbers.

Suggested Citation

  • Bo Cai & Lu Zhou & Pei-Yan Zhao & Hua-Long Peng & Zhi-Ling Hou & Pengfei Hu & Li-Min Liu & Guang-Sheng Wang, 2024. "Interface-induced dual-pinning mechanism enhances low-frequency electromagnetic wave loss," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-47537-5
    DOI: 10.1038/s41467-024-47537-5
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    1. Vassil Skumryev & Stoyan Stoyanov & Yong Zhang & George Hadjipanayis & Dominique Givord & Josep Nogués, 2003. "Beating the superparamagnetic limit with exchange bias," Nature, Nature, vol. 423(6942), pages 850-853, June.
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