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Ultrahigh coercivity and core–shell microstructure achieved in oriented Nd–Fe–B thin films diffusion-processed with Dy-based alloys

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Abstract

Ultrahigh ambient coercivities of ~4 T were achieved in Nd–Fe–B benchmark thin film with coercivity of 1.06 T by diffusion-processing with Dy, Dy70Cu30 and Dy80Ag20 alloy layer. High texture and good squareness were obtained. In triple-junction regions, Dy element was found to be immiscible with Nd element. Microstructure observation indicated the typical gradient elementary distribution. Unambiguous core/shell microstructure was characterized by transition electron microscopy. Due to the enhanced ambient coercivity, the coercivity temperature stability was also substantially increased.

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Acknowledgements

This work was supported by National Natural Science Foundation of China under Grant No. 51501033, National Natural Science Funds for Distinguished Young Scholar under Grant No. 51425401 and Fundamental Research Funds for the Central Universities under Grant No. 140901001.

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Authors and Affiliations

  1. Key Laboratory of Electromagnetic Processing of Materials (EPM), Ministry of Education, Northeastern University, Shenyang, 110819, China

    Tongbo Zhang, **aoqian Zhou, Dedong Yu, Yanqing Fu, Guojian Li, Weibin Cui & Qiang Wang

  2. Department of Physics and Chemistry of Materials, School of Materials Science and Engineering, Northeastern University, Shenyang, 110819, China

    Tongbo Zhang, **aoqian Zhou, Dedong Yu, Yanqing Fu & Weibin Cui

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  1. Tongbo Zhang
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  2. **aoqian Zhou
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  3. Dedong Yu
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  4. Yanqing Fu
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  5. Guojian Li
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  6. Weibin Cui
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  7. Qiang Wang
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Correspondence to Weibin Cui.

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Zhang, T., Zhou, X., Yu, D. et al. Ultrahigh coercivity and core–shell microstructure achieved in oriented Nd–Fe–B thin films diffusion-processed with Dy-based alloys. Appl. Phys. A 123, 111 (2017). https://doi.org/10.1007/s00339-016-0709-0

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  • DOI: https://doi.org/10.1007/s00339-016-0709-0

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