Dynamic magnetization process of low loss Fe/submicron FeNi soft magnetic composites for inductor

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

Journal of Magnetism and Magnetic Materials Pub Date : 2025-06-06 DOI:10.1016/j.jmmm.2025.173275

Sizhe He , Xinyan Huang , Aikui Li , Junzhou Wang , Yifeng Chen , Qiang Li , Yong Zhang , Jiawei Fei , Hao Huang , Xuefeng Zhang

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引用次数: 0

Abstract

High-performance power supply and electronic equipment require power inductor to work at high frequency with high energy efficiency, it is urgent to develop high-frequency soft magnetic composites with low loss. A promising Fe/submicron FeNi soft magnetic composite was successfully fabricated by hybrid carbonyl iron powder and submicron FeNi particles, which can be easily produced as mini molding inductors under the existing industrial conditions. Compared with the inductor made by carbonyl iron powders, the inductor with 30 wt% submicron FeNi particles can obtain better DC bias performance (saturation current increased by 9.8 %) and lower loss (the quality factor increased from 13 to 20, an increase of 53.8 %). The influence of submicron FeNi particles on the magnetic loss of soft magnetic composites was discussed from the view of microstructure and dynamic magnetization process. With the decrease of particle size, the number of magnetic domains in particles decrease and the size become finer, which leads to the decrease of domain wall resonance component and the enhancement of spin rotation component during dynamic magnetization. The reduction of domain wall displacement and domain refinement reduce hysteresis loss and excess loss. The small size of submicron FeNi particles also lead to low eddy current loss. Our findings might shed insight on the design of novel soft magnetic composites with low power loss.

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电感用低损耗铁/亚微米FeNi软磁复合材料的动态磁化过程

高性能电源和电子设备要求功率电感工作在高频率和高能效下，开发低损耗的高频软磁复合材料迫在眉睫。利用羰基铁粉与亚微米FeNi颗粒的杂化制备了一种很有前途的Fe/亚微米FeNi软磁复合材料，在现有的工业条件下可以很容易地制成微型模压电感。与羰基铁粉制作的电感相比，添加30 wt%亚微米FeNi颗粒的电感具有更好的直流偏置性能（饱和电流提高9.8%）和更低的损耗（质量因数从13提高到20，提高53.8%）。从微观结构和动态磁化过程的角度讨论了亚微米FeNi颗粒对软磁复合材料磁损失的影响。随着颗粒尺寸的减小，颗粒中的磁畴数量减少，颗粒尺寸变小，导致动态磁化过程中畴壁共振分量减小，自旋旋转分量增强。畴壁位移的减小和畴的细化降低了磁滞损耗和过剩损耗。亚微米FeNi颗粒的小尺寸也导致了低涡流损耗。我们的研究结果可能为设计新型低功耗软磁复合材料提供启示。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.