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Chin. Phys. B, 2023, Vol. 32(9): 097504    DOI: 10.1088/1674-1056/acaa24
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

Effect of CeO2 doping on the coercivity of 2:17 type SmCo magnets

Xiao-Lei Gao(高晓磊)1,2, Zhuang Liu(刘壮)2,†, Guang-Qing Wang(王广庆)2, Chao-Qun Zhu(竺超群)1,2, Wen-Xin Cheng(程文鑫)2, Ming-Xiao Zhang(张明晓)2, Xin-Cai Liu(刘新才)1,‡, Ren-Jie Chen(陈仁杰)2, and A-Ru Yan(闫阿儒)2
1 School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China;
2 CISRI & NIMTE Joint Innovation Center for Rare Earth Permanent Magnets, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
Abstract  The effects of CeO2 doping on the magnetic properties and microstructure of 2:17 type SmCo magnets are studied. With the increase of CeO2 from 0 wt.% to 3 wt.%, the coercivity of the magnets increases from 22.22 kOe to over 29.37 kOe, which is an increase of more than 30%. When the doping content is lower than 1 wt.%, the remanence and magnetic energy product of the magnets remain almost constant. Both decrease sharply as the doping concentration further increases. After CeO2 doping, the oxide content in the magnet increases significantly and the Ce element is uniformly distributed in the magnet. Observing the magnetic domains reveals that doping with CeO2 can refine the magnetic domains and make the magnetic domain wall more stable, resulting in a significant increase in the coercivity of the magnets.
Keywords:  2:17 type SmCo magnets      coercivity      magnetic domain      microstructure  
Received:  19 July 2022      Revised:  16 November 2022      Accepted manuscript online:  09 December 2022
PACS:  75.50.Ww (Permanent magnets)  
Fund: Project supported by the National Key R&D Program of China (Grant No. 2021YFB3503102), the Zhejiang Provincial Key R&D Program of China (Grant No. 2021C01191), and the Science and Technology Innovation 2025 Major Project of Ningbo (Grant No. 2020Z037).
Corresponding Authors:  Zhuang Liu, Xin-Cai Liu     E-mail:  zliu@nimte.ac.cn;liuxincai@nbu.edu.cn

Cite this article: 

Xiao-Lei Gao(高晓磊), Zhuang Liu(刘壮), Guang-Qing Wang(王广庆), Chao-Qun Zhu(竺超群), Wen-Xin Cheng(程文鑫), Ming-Xiao Zhang(张明晓), Xin-Cai Liu(刘新才), Ren-Jie Chen(陈仁杰), and A-Ru Yan(闫阿儒) Effect of CeO2 doping on the coercivity of 2:17 type SmCo magnets 2023 Chin. Phys. B 32 097504

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