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Vortex-based soft magnetic composite with ultrastable permeability up to gigahertz frequencies

Author

Listed:
  • Guohua Bai

    (Hangzhou Dianzi University)

  • Jiayi Sun

    (Hangzhou Dianzi University)

  • Zhenhua Zhang

    (Hangzhou Dianzi University)

  • Xiaolian Liu

    (Hangzhou Dianzi University)

  • Sateesh Bandaru

    (Hangzhou Dianzi University)

  • Weiwei Liu

    (Hangzhou Dianzi University)

  • Zhong Li

    (Hangzhou Dianzi University)

  • Hongxia Li

    (Hangzhou Dianzi University)

  • Ningning Wang

    (Hangzhou Dianzi University)

  • Xuefeng Zhang

    (Hangzhou Dianzi University)

Abstract

Soft magnetic materials with stable permeability up to hundreds of megahertz (MHz) are urgently needed for integrated transformers and inductors, which are crucial in the more-than-Moore era. However, traditional frequency-stable soft magnetic ferrites suffer from low saturation magnetization and temperature instability, making them unsuitable for integrated circuits. Herein, we fabricate a frequency-stable soft magnetic composite featuring a magnetic vortex structure via cold-sintering, where ultrafine FeSiAl particles are magnetically isolated and covalently bonded by Al2SiO5/SiO2/Fe2(MoO4)3 multilayered heterostructure. This construction results in an ultrastable permeability of 13 up to 1 gigahertz (GHz), relatively large saturation magnetization of 105 Am2/kg and low coercivity of 48 A/m, which we ascribe to the elimination of domain walls associated with almost uniform single-vortex structures, as observed by Lorentz transmission electron microscopy and reconstructed by micromagnetic simulation. Moreover, the ultimate compressive strength has been simultaneously increased up to 337.1 MPa attributed to the epitaxially grown interfaces between particles. This study deepens our understanding on the characteristics of magnetic vortices and provides alternative concept for designing integrated magnetic devices.

Suggested Citation

  • Guohua Bai & Jiayi Sun & Zhenhua Zhang & Xiaolian Liu & Sateesh Bandaru & Weiwei Liu & Zhong Li & Hongxia Li & Ningning Wang & Xuefeng Zhang, 2024. "Vortex-based soft magnetic composite with ultrastable permeability up to gigahertz frequencies," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
  • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-46650-9
    DOI: 10.1038/s41467-024-46650-9
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    References listed on IDEAS

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    1. Liuliu Han & Fernando Maccari & Isnaldi R. Souza Filho & Nicolas J. Peter & Ye Wei & Baptiste Gault & Oliver Gutfleisch & Zhiming Li & Dierk Raabe, 2022. "A mechanically strong and ductile soft magnet with extremely low coercivity," Nature, Nature, vol. 608(7922), pages 310-316, August.
    2. A. Dussaux & B. Georges & J. Grollier & V. Cros & A.V. Khvalkovskiy & A. Fukushima & M. Konoto & H. Kubota & K. Yakushiji & S. Yuasa & K.A. Zvezdin & K. Ando & A. Fert, 2010. "Large microwave generation from current-driven magnetic vortex oscillators in magnetic tunnel junctions," Nature Communications, Nature, vol. 1(1), pages 1-6, December.
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