Broadened ferromagnetic resonance range in ferrite by gradient composition design

Magnetic materials with broad ferromagnetic resonance (FMR) range have great potential in microwave absorption field. In this work, M type barium ferrites with local chemical gradients were prepared by mixing and heating the ferrite powders with different Zr4+-Ni2+ contents, constructing the locally...

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Bibliographic Details
Published in:Ceramics international 2019-12, Vol.45 (18), p.24900-24902
Main Authors: Liu, Chuyang, Cao, Yufan, Zhang, Xiaohan, Ren, Hao, Zhang, Yujing, Zhang, Yanting, Zhao, Xinrui, Fang, Gang, Peng, Kangsen, Zou, Junding
Format: Article
Language:English
Subjects:
Barium ferrite
Ferromagnetic resonance
Gradient substitution
Magnetic materials
Magnetocrystalline anisotropy
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Summary:Magnetic materials with broad ferromagnetic resonance (FMR) range have great potential in microwave absorption field. In this work, M type barium ferrites with local chemical gradients were prepared by mixing and heating the ferrite powders with different Zr4+-Ni2+ contents, constructing the locally inhomogeneous magnetocrystalline anisotropy field to widen the FMR range. The results show that ionic diffusion process starts significantly at 1000 °C. The mixed ferrite reheated at 1100 °C finally exhibits the broadest FMR range (7.32 GHz) because of the appropriate gradient composition design, which is much wider than that of the original uniformly substituted barium ferrites.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2019.08.107