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Asymmetric behavior of irreversible weak pinning at the soft/hard magnetically interface revealed by the open recoil loops

  • Functional Nanocomposite Materials
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Abstract

Analyzing the magnetization reversal process is crucial for enhancing the magnetic properties of nanocomposite magnets, thereby subsequently increasing the magnetic energy product and advancing the development of next-generation rare earth permanent magnet materials. Here, the open recoil loop is systematically investigated based on micromagnetic simulations and comparing magnetization configurations, which is strongly associated with the asymmetric behavior of weak pinning at the soft/hard magnetic interface. By removing and reapplying field, the irreversible weak pinning sites exhibit asymmetric behavior, leading to the formation of open phenomena in nanocomposites. The open degree of recoil loops obtained from experimental testing was also correlated with the irreversible magnetization, which supports the simulation results. Our findings provide a novel approach for understanding the magnetization reversal mechanism in nanocomposite magnets.

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Data availability

The data that support the findings of this study are available from the corresponding authors upon reasonable request.

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Acknowledgements

This work was supported by the National Key R&D Program of China (No. 2021YFB3500300), the National Natural Science Foundation of China (Nos. 51931007, 52371170), the Program of Top Disciplines Construction in Beijing (Grant PXM2019_014204_500031).

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Authors and Affiliations

  1. College of Materials Science and Engineering, Key Laboratory of Advanced Functional Materials, Ministry of Education of China, Beijing University of Technology, Beijing, 100124, China

    Yuqing Li, Xuerui Xu, Yuan Teng, Mengying Bian, Hongguo Zhang, Xiaochang Xu, Yitong Zhuge, Weiqiang Liu & Ming Yue

  2. Zhengzhou Non-Ferrous Metals Research Institute Co.Ltd of CHALCO, Zhengzhou, 450041, China

    Yuan Teng

  3. School of Mechanical and Electrical Engineering, Henan Institute of Science and Technology, Xinxiang, 453000, China

    Xiaochang Xu

  4. Hengdian Group DMEGC Magnetics Co., Ltd, Dongyang, 322118, China

    Yitong Zhuge

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  1. Yuqing Li
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  2. Xuerui Xu
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  3. Yuan Teng
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  9. Ming Yue
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Correspondence to Mengying Bian or Ming Yue.

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Supplementary Information

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10853_2024_9629_MOESM1_ESM.docx

The supplementary materials include three figures, S1–S3, which respectively illustrate the magnetization configuration at H = − 15.8 kOe, the magnetization configuration of the closed recoil loops, and the magnetization configuration of the open recoil loop. (DOCX 1297 KB)

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Li, Y., Xu, X., Teng, Y. et al. Asymmetric behavior of irreversible weak pinning at the soft/hard magnetically interface revealed by the open recoil loops. J Mater Sci (2024). https://doi.org/10.1007/s10853-024-09629-x

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  • DOI: https://doi.org/10.1007/s10853-024-09629-x

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