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A novel strategy for the fabrication of high-performance nanostructured Ce-Fe-B magnetic materials via electron-beam exposure
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  • Published: 25 May 2021

A novel strategy for the fabrication of high-performance nanostructured Ce-Fe-B magnetic materials via electron-beam exposure

一种通过电子束曝光制备高性能纳米结构Ce-Fe-B磁性材料的新方法

  • Liang Zha  (查亮)1,
  • Cholsong Kim  (金哲星)1,
  • Chao Yun  (贠超)1,
  • Dong Zhou  (周栋)2,
  • Wei Li  (李卫)2,
  • Xiangdong Kong  (孔祥东)3,
  • Li Han  (韩立)3,
  • Wenyun Yang  (杨文云)1,
  • Shunquan Liu  (刘顺荃)1,
  • Jingzhi Han  (韩景智)1,
  • Changsheng Wang  (王常生)1,
  • Honglin Du  (杜红林)1,
  • Weixing Xia  (夏卫星)4,
  • Alberto Bollero5 &
  • …
  • Jinbo Yang  (杨金波)1,6,7 

Science China Materials volume 64, pages 2519–2529 (2021)Cite this article

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Abstract

Ce2Fe14B compound has a great potential to serve as a novel permanent magnet alternative thanks to the abundant and inexpensive rare-earth element (cerium), while its low magnetocrystalline anisotropy and energy product severely restrict its applications. In this work, a novel strategy combining melt-spinning and electron-beam exposure (EBE) aiming for fabricating high-performance Ce-Fe-B magnetic materials is reported to solve the above-mentioned problem. Remarkably, this strategy facilitates developing a suitable grain boundary configuration without using any additional heavy rare-earth element. Under the optimal EBE condition, the maximum energy product ((BH)max) of pure Ce-Fe-B alloy is 6.5 MGOe, about four times higher than that obtained after conventional rapid thermal processing method for the same precursor. The enhanced intergranular magnetostatic coupling effect in the EBE sample is validated by mapping the first-order-reversal-curve (FORC) diagrams. The in-situ observation of magnetic domain wall motion for Ce-Fe-B alloy using Lorentz transmission electron microscopy reveals that the boundary layers are very effective in pinning the motion of domain walls, leading to the increased coercivity under EBE, and this pinning effect is further verified by micromagnetic simulations. Our results suggest that CeFeB materials using EBE could be a promising candidate after further processing, which could fill the performance “gap” between hexaferrite and Nd-Fe-B-based magnets.

摘要

Ce2Fe14B作为一种基于广泛而廉价的稀土(铈)的新型永磁体, 低矫顽力和低最大磁能积严重限制了其在永磁领域中的应用. 在 这项工作中, 我们报道了一种将熔融纺丝技术和电子束曝光(EBE) 技术结合的新方法, 旨在制造高性能Ce-Fe-B磁体. 值得注意的是, 该方法可以在不使用任何其他重稀土元素的情况下调控出合适的 晶界构型. 在最佳EBE条件下, 纯Ce-Fe-B合金的最大磁能积为 6.5 MGOe, 比常规快速热处理方法制备的合金的最大磁能积高四 倍左右. 这说明, 使用EBE制备的CeFeB材料作为前驱体, 经过进一 步加工之后, 如热变形或烧结, 有望填补六角铁氧体与Nd-Fe-B磁 体之间的市场空白.

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Acknowledgements

This work was supported by the National Key Research and Development Program of China (2016YFB0700901), the National Natural Science Foundation of China (51731001, 11675006 and 51371009). We appreciate the financial support from the China Scholarship Council (CSC) by a State Scholarship Fund (201906010220). The authors thank Dr. Yanli Li at the Institute of Electrical Engineering (Chinese Academy of Sciences, Beijing, China) for experimental guidance, M.S. Meiling Zhang at the Central Iron & Steel Research Institute (Beijing, China) for aiding in the TEM characterizations, M.S. Jin Zhu for TEM sample preparing. Alberto Bollero acknowledges support from the “Severo Ochoa” Programme for Centres of Excellence in R&D (MINECO, SEV-2016-0686).

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Authors and Affiliations

  1. State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University, Beijing, 100871, China

    Liang Zha  (查亮), Cholsong Kim  (金哲星), Chao Yun  (贠超), Wenyun Yang  (杨文云), Shunquan Liu  (刘顺荃), Jingzhi Han  (韩景智), Changsheng Wang  (王常生), Honglin Du  (杜红林) & Jinbo Yang  (杨金波)

  2. Functional Materials Research Institute, Central Iron & Steel Research Institute, Beijing, 100081, China

    Dong Zhou  (周栋) & Wei Li  (李卫)

  3. Department of Micro-Nano Fabrication Technology, Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing, 100190, China

    Xiangdong Kong  (孔祥东) & Li Han  (韩立)

  4. Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China

    Weixing Xia  (夏卫星)

  5. Division of Permanent Magnets and Applications, IMDEA Nanoscience, Madrid, Spain

    Alberto Bollero

  6. Collaborative Innovation Center of Quantum Matter, Beijing, 100871, China

    Jinbo Yang  (杨金波)

  7. Beijing Key Laboratory for Magnetoelectric Materials and Devices, Beijing, 100871, China

    Jinbo Yang  (杨金波)

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  1. Liang Zha  (查亮)
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Contributions

Zha L designed and performed the experiments, and wrote the paper; Kim C completed the micromagnetic simulation; Xia W and Yang J supervised this study. All authors contributed to the general discussion and revision of the manuscript.

Corresponding authors

Correspondence to Weixing Xia  (夏卫星) or Jinbo Yang  (杨金波).

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Conflict of interest

The authors declare that they have no conflict of interest.

Liang Zha received his Bachelor’s degree from Anhui University in 2016. Currently, he is a PhD candidate at Peking University (PKU). His current research interest focuses on the synthesis and design of functional magnetic materials.

Jinbo Yang is a professor and the leader of the Center for Magnetism Magnetics at the School of Physics, PKU. He received his PhD in condensed matter physics from PKU in 1998 and performed post-doctoral research at the Leibniz Institute for Solid State and Materials Research-Dresden Germany from 1998 to 2000. He then worked at the University of Missouri-Rolla (UMR) from 2001 to 2008. He became a full professor at PKU in 2008. His research interest focuses on the structure and magnetism in condensed matter, including hard/soft magnets, crystal, magnetic and electronic structures of magnetic materials, nanomagnetism and spintronics.

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40843_2020_1650_MOESM1_ESM.pdf

A novel strategy for the fabrication of high-performance nanostructured Ce-Fe-B magnetic materials via electron-beam exposure

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Cite this article

Zha, L., Kim, C., Yun, C. et al. A novel strategy for the fabrication of high-performance nanostructured Ce-Fe-B magnetic materials via electron-beam exposure. Sci. China Mater. 64, 2519–2529 (2021). https://doi.org/10.1007/s40843-020-1650-2

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  • Received: 06 November 2020

  • Accepted: 22 February 2021

  • Published: 25 May 2021

  • Issue Date: October 2021

  • DOI: https://doi.org/10.1007/s40843-020-1650-2

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Keywords

  • nanoscale magnets
  • rapid thermal annealing
  • Ce-Fe-B
  • magnetic properties
  • nanocrystalline material
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