具有双铁磁层结构的薄膜吸波剂及其磁共振频率调控研究

徐子洋; 李维; 王峰; 刘星

doi:10.19554/j.cnki.1001-3563.2025.17.002

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包装工程（技术栏目） ›› 2025, Vol. 46 ›› Issue (17) : 10-18. DOI: 10.19554/j.cnki.1001-3563.2025.17.002

轻质宽频电磁复合材料

具有双铁磁层结构的薄膜吸波剂及其磁共振频率调控研究

徐子洋^1a,b, 李维^1b,2,*, 王峰^1a,2, 刘星^1b,2

作者信息 +

Thin-film Wave Absorbers with a Double Ferromagnetic Layer Structure and Their Magnetic Resonance Frequency Modulation

XU Ziyang^1a,b, LI Wei^1b,2,*, WANG Feng^1a,2, LIU Xing^1b,2

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文章历史 +

摘要

目的通过调节双铁磁层厚度比获得高磁导率吸波剂和吸波性能宽频可设计的磁性吸波材料。方法采用磁控溅射法溅射控制Fe₅₀Co₅₀、Ni靶的溅射时间进而调控Fe₅₀Co₅₀、Ni的厚度比,制备出不同厚度比的(Fe₅₀Co₅₀/Ni/SiO₂)_n多层结构磁性薄膜材料,并通过将(Fe₅₀Co₅₀/Ni/SiO₂)_n薄膜溶于醇水溶液中超声破碎获得对应不同频率的吸收剂。结果在Fe₅₀Co₅₀与Ni厚度比由0∶4增加至4∶0的过程中,薄膜的面内各向异性在3 819~8 992 A/m之间调节,铁磁共振频率在1.3~4.5 GHz实现调控。结论调控磁性薄膜内部Fe₅₀Co₅₀与Ni层厚度比的方法可以有效地增大材料的饱和磁化强度以及面内各向异性场,进而调节了吸波材料的铁磁共振频率,拓宽了该材料体系的应用频段。

Abstract

The work aims to obtain high permeability wave absorbers and magnetic wave-absorbing materials with designable broadband designable wave-absorbing properties by adjusting the thickness ratio of the double ferromagnetic layer. Magnetron sputtering method was used to sputter control the sputtering time of Fe50Co50 and Ni target and then regulate the thickness ratio of Fe₅₀Co₅₀ and Ni to prepare (Fe₅₀Co₅₀/Ni/SiO₂)_n multilayer structured magnetic thin-film materials with different thickness ratios, and the (Fe₅₀Co₅₀/Ni/SiO₂)_n thin films were ultrasonically crushed by dissolving them into an alcohol aqueous solution to obtain the magnetic absorbers with different frequencies. The in-plane anisotropy of the films was regulated between 3 819~8 992 A/m and the ferromagnetic resonance frequency was achieved between 1.3 and 4.5 GHz during the increase of the Fe₅₀Co₅₀ to Ni thickness ratio from 0∶4 to 4∶0. The method of regulating the thickness ratio of Fe₅₀Co₅₀ to Ni layer inside the magnetic film can effectively increase the saturation magnetisation strength and the in-plane anisotropy field of the material, which in turn regulates the ferromagnetic resonance frequency of the wave-absorbing material and broadens the frequency band of application of this material system.

导出引用

徐子洋, 李维, 王峰, 刘星. 具有双铁磁层结构的薄膜吸波剂及其磁共振频率调控研究[J]. 包装工程（技术栏目）. 2025, 46(17): 10-18 https://doi.org/10.19554/j.cnki.1001-3563.2025.17.002

XU Ziyang, LI Wei, WANG Feng, LIU Xing. Thin-film Wave Absorbers with a Double Ferromagnetic Layer Structure and Their Magnetic Resonance Frequency Modulation[J]. Packaging Engineering. 2025, 46(17): 10-18 https://doi.org/10.19554/j.cnki.1001-3563.2025.17.002

中图分类号： TB32 TB48 TB33

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