掺杂 Gd-Al-Co 的 M 型六价钡铁氧体在 2-18 GHz 范围内的宽带微波吸收和电磁特性

IF 2.5 3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Magnetism and Magnetic Materials Pub Date : 2024-10-24 DOI:10.1016/j.jmmm.2024.172609

Weihua Liao, Kai Huang, Wenwen Xu, Jiangying Yu, Ping Li, Jinrong Xu

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引用次数: 0

摘要

通过水热法合成了掺杂 Gd-Al-Co 的 BaFe12-3x(GdAlCo)xO19（x = 0、0.1、0.2、0.3、0.4）。我们使用 XRD、SEM、BET、VSM、XPS 和 VNA 技术对其进行了综合表征，以探讨用磁性 Co2+、Gd3+ 和非磁性 Al3+ 替代 Fe3+ 对 BaFe12-3x(GdAlCo)xO19 的形貌、比表面积、磁性和微波吸收 (MWA) 性能的影响。通过研究 BaFe12-3x(GdAlCo)xO19 在 2-18 GHz 范围内的微波吸收特性，我们发现所有掺杂样品都表现出优异的微波吸收特性。样品 BaFe11.1(GdAlCo)0.3O19 在厚度为 2.07 mm 时的最小反射损耗 (RLmin) 为 - 48.13 dB，表明对入射微波的吸收率超过 99%。所有四组掺杂样品的有效吸收带宽（EAB）都超过了 5.98 GHz。值得注意的是，x = 0.1 样品的有效吸收带宽达到 9.15 GHz，厚度仅为 2.0 mm，覆盖了大部分 X 波段和整个 Ku 波段。在 BaFe12O19 中掺杂 Gd-Al-Co 不仅能提高其反射损耗能力，还能增加其吸收带宽。改善了 BaFe12O19 带宽窄、损耗能力差的缺点。因此，BaFe12-3x(GdAlCo)xO19 材料具有很大的实际应用潜力。

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Broadband microwave absorption and electromagnetic properties of Gd–Al–Co-doped M−type barium hexaferrite in 2–18 GHz range

Gd–Al–Co-doped BaFe_12−3x(GdAlCo)_xO₁₉ (x = 0, 0.1, 0.2, 0.3, 0.4) was synthesized via the hydrothermal method. We performed comprehensive characterization using XRD, SEM, BET, VSM, XPS, and VNA techniques to explore the impact of substituting magnetic Co²⁺, Gd³⁺, and nonmagnetic Al³⁺ for Fe³⁺ on the morphology, specific surface area, magnetic, and microwave absorption (MWA) properties of BaFe_12−3x(GdAlCo)_xO₁₉. Investigating the MWA properties of BaFe_12−3x(GdAlCo)_xO₁₉ in the 2–18 GHz range, we find that all doped samples demonstrate excellent MWA characteristics. The sample BaFe_11.1(GdAlCo)_0.3O₁₉ achieves a minimum reflection loss (RL_min) of − 48.13 dB at a thickness of 2.07 mm, indicating an absorption of over 99 % of incident microwaves. The effective absorption bandwidth (EAB) for all four groups of doped samples exceeds 5.98 GHz. Notably, the x = 0.1 samples reach an EAB of 9.15 GHz at only 2.0 mm thickness, covering most of the X-band and the entire Ku band. Gd-Al-Co co doping of BaFe₁₂O₁₉ not only improves its reflection loss ability, but also increases its absorption bandwidth. Improved the drawbacks of narrow bandwidth and poor loss capability in BaFe₁₂O₁₉. Consequently, BaFe_12−3x(GdAlCo)_xO₁₉ material shows significant potential for practical applications.

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来源期刊

Journal of Magnetism and Magnetic Materials 物理-材料科学：综合

CiteScore

5.30

自引率

11.10%

发文量

1149

审稿时长

59 days

期刊介绍： The Journal of Magnetism and Magnetic Materials provides an important forum for the disclosure and discussion of original contributions covering the whole spectrum of topics, from basic magnetism to the technology and applications of magnetic materials. The journal encourages greater interaction between the basic and applied sub-disciplines of magnetism with comprehensive review articles, in addition to full-length contributions. In addition, other categories of contributions are welcome, including Critical Focused issues, Current Perspectives and Outreach to the General Public. Main Categories: Full-length articles: Technically original research documents that report results of value to the communities that comprise the journal audience. The link between chemical, structural and microstructural properties on the one hand and magnetic properties on the other hand are encouraged. In addition to general topics covering all areas of magnetism and magnetic materials, the full-length articles also include three sub-sections, focusing on Nanomagnetism, Spintronics and Applications. The sub-section on Nanomagnetism contains articles on magnetic nanoparticles, nanowires, thin films, 2D materials and other nanoscale magnetic materials and their applications. The sub-section on Spintronics contains articles on magnetoresistance, magnetoimpedance, magneto-optical phenomena, Micro-Electro-Mechanical Systems (MEMS), and other topics related to spin current control and magneto-transport phenomena. The sub-section on Applications display papers that focus on applications of magnetic materials. The applications need to show a connection to magnetism. Review articles: Review articles organize, clarify, and summarize existing major works in the areas covered by the Journal and provide comprehensive citations to the full spectrum of relevant literature.