Origin of coercivity difference in Nd-Y-Fe-B single-main-phase and multi-main-phase magnets: Role of core–shell structures
Nd-Fe-B magnets with 30 at.% Y substitution were prepared using single-main-phase (SMP) and multi-main-phase (MMP) techniques to investigate the differences in magnetic properties and microstructures between spontaneously formed core–shell structures in the SMP magnet and those formed by elemental d...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-10-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127525010445 |
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| author | Sining Fan Ronghuan Xie Qiye Li Zifan Liu Xiaodong Fan Guangfei Ding Shuai Cao Bo Zheng Shuai Guo Renjie Chen Aru Yan Shaolong Tang |
| author_facet | Sining Fan Ronghuan Xie Qiye Li Zifan Liu Xiaodong Fan Guangfei Ding Shuai Cao Bo Zheng Shuai Guo Renjie Chen Aru Yan Shaolong Tang |
| author_sort | Sining Fan |
| collection | DOAJ |
| description | Nd-Fe-B magnets with 30 at.% Y substitution were prepared using single-main-phase (SMP) and multi-main-phase (MMP) techniques to investigate the differences in magnetic properties and microstructures between spontaneously formed core–shell structures in the SMP magnet and those formed by elemental diffusion in the MMP magnet. Both SMP and MMP magnets exhibit different compositional types of core–shell structured grains, yet their phase structures and the rare-earth (RE) contents in the grain shells are consistent. The SMP magnet demonstrates a coercivity of 6.50 kOe, higher than the 4.96 kOe of the MMP magnet. Micromagnetic simulation results reveal that when the grain shell composition is consistent, the grain core has a more significant impact on the demagnetization process of the magnet. The magnetic domains of the MMP magnet with a higher proportion of Y-rich cores reverse at a lower external field. This correlation between microstructure and magnetic properties provides new insights into the structural design of Y-containing magnets. |
| format | Article |
| id | doaj-art-258d3283127249a593ba967fcd300ebb |
| institution | Kabale University |
| issn | 0264-1275 |
| language | English |
| publishDate | 2025-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj-art-258d3283127249a593ba967fcd300ebb2025-08-24T05:11:23ZengElsevierMaterials & Design0264-12752025-10-0125811462410.1016/j.matdes.2025.114624Origin of coercivity difference in Nd-Y-Fe-B single-main-phase and multi-main-phase magnets: Role of core–shell structuresSining Fan0Ronghuan Xie1Qiye Li2Zifan Liu3Xiaodong Fan4Guangfei Ding5Shuai Cao6Bo Zheng7Shuai Guo8Renjie Chen9Aru Yan10Shaolong Tang11CISRI & NIMTE Joint Innovation Center for Rare Earth Permanent Magnets, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, PR China; Jiangsu Key Laboratory for Nanotechnology, Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructures, School of Physics, Nanjing University, Nanjing 210093, PR ChinaCISRI & NIMTE Joint Innovation Center for Rare Earth Permanent Magnets, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, PR ChinaCISRI & NIMTE Joint Innovation Center for Rare Earth Permanent Magnets, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, PR ChinaCISRI & NIMTE Joint Innovation Center for Rare Earth Permanent Magnets, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, PR ChinaCISRI & NIMTE Joint Innovation Center for Rare Earth Permanent Magnets, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, PR ChinaCISRI & NIMTE Joint Innovation Center for Rare Earth Permanent Magnets, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, PR China; Corresponding authors.CISRI & NIMTE Joint Innovation Center for Rare Earth Permanent Magnets, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, PR ChinaCISRI & NIMTE Joint Innovation Center for Rare Earth Permanent Magnets, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, PR ChinaCISRI & NIMTE Joint Innovation Center for Rare Earth Permanent Magnets, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, PR China; Corresponding authors.CISRI & NIMTE Joint Innovation Center for Rare Earth Permanent Magnets, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, PR China; Corresponding authors.CISRI & NIMTE Joint Innovation Center for Rare Earth Permanent Magnets, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, PR ChinaJiangsu Key Laboratory for Nanotechnology, Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructures, School of Physics, Nanjing University, Nanjing 210093, PR ChinaNd-Fe-B magnets with 30 at.% Y substitution were prepared using single-main-phase (SMP) and multi-main-phase (MMP) techniques to investigate the differences in magnetic properties and microstructures between spontaneously formed core–shell structures in the SMP magnet and those formed by elemental diffusion in the MMP magnet. Both SMP and MMP magnets exhibit different compositional types of core–shell structured grains, yet their phase structures and the rare-earth (RE) contents in the grain shells are consistent. The SMP magnet demonstrates a coercivity of 6.50 kOe, higher than the 4.96 kOe of the MMP magnet. Micromagnetic simulation results reveal that when the grain shell composition is consistent, the grain core has a more significant impact on the demagnetization process of the magnet. The magnetic domains of the MMP magnet with a higher proportion of Y-rich cores reverse at a lower external field. This correlation between microstructure and magnetic properties provides new insights into the structural design of Y-containing magnets.http://www.sciencedirect.com/science/article/pii/S0264127525010445Nd-Y-Fe-BHigh-abundance rare earth elementsCore-shell structureCoercivityMicromagnetic simulation |
| spellingShingle | Sining Fan Ronghuan Xie Qiye Li Zifan Liu Xiaodong Fan Guangfei Ding Shuai Cao Bo Zheng Shuai Guo Renjie Chen Aru Yan Shaolong Tang Origin of coercivity difference in Nd-Y-Fe-B single-main-phase and multi-main-phase magnets: Role of core–shell structures Materials & Design Nd-Y-Fe-B High-abundance rare earth elements Core-shell structure Coercivity Micromagnetic simulation |
| title | Origin of coercivity difference in Nd-Y-Fe-B single-main-phase and multi-main-phase magnets: Role of core–shell structures |
| title_full | Origin of coercivity difference in Nd-Y-Fe-B single-main-phase and multi-main-phase magnets: Role of core–shell structures |
| title_fullStr | Origin of coercivity difference in Nd-Y-Fe-B single-main-phase and multi-main-phase magnets: Role of core–shell structures |
| title_full_unstemmed | Origin of coercivity difference in Nd-Y-Fe-B single-main-phase and multi-main-phase magnets: Role of core–shell structures |
| title_short | Origin of coercivity difference in Nd-Y-Fe-B single-main-phase and multi-main-phase magnets: Role of core–shell structures |
| title_sort | origin of coercivity difference in nd y fe b single main phase and multi main phase magnets role of core shell structures |
| topic | Nd-Y-Fe-B High-abundance rare earth elements Core-shell structure Coercivity Micromagnetic simulation |
| url | http://www.sciencedirect.com/science/article/pii/S0264127525010445 |
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