Investigation of magnetic domain evolutions and microstructural changes in Pr–Dy–Cu modified Nd–Fe–B magnets
Abstract The enhancement of coercivity in Nd–Fe–B sintered magnets modified by Pr 58 Dy 10 Cu 32 alloy was investigated through scanning electron microscope (SEM) and in-situ magneto-optic Kerr effect (MOKE) microscopy. The modification treatment resulted in the formation of a smooth and continuous weakly magnetic grain boundary layer and the (Nd,Pr,Dy) 2 Fe 14 B main phase with a high magnetocrystalline anisotropy field, leading to an increased coercivity of 23 kOe. MOKE observations revealed that the dynamic evolution of the maze domain area under an external magnetic field varied significantly between the original and modified magnets. Compared with the original magnets, the modified magnets exhibited a slower decrease in maze domain area during magnetization and a slower increase during reverse magnetization, contributing to the observed coercivity enhancement.
Authors
- Peng Shen (ORCID: https://orcid.org/0000-0002-0967-893X)
- Shunquan Liu
- Huibo B. Cao (ORCID: https://orcid.org/0000-0002-5970-4980)
- Wenyun Yang (ORCID: https://orcid.org/0000-0002-9649-4265)
- Hui-Dong Qian (ORCID: https://orcid.org/0000-0002-6122-3537)
- Ming Ji
- Jinbo Yang (ORCID: https://orcid.org/0000-0003-3517-9701)
- Lei Zhou (ORCID: https://orcid.org/0000-0002-0678-8682)
- Tao Liu (ORCID: https://orcid.org/0000-0003-0267-4925)
- Yan Li (ORCID: https://orcid.org/0000-0002-1401-7925)
- Ying-chang Yang
- Jingzhi Han (ORCID: https://orcid.org/0000-0001-7505-9478)
- Ming Yue
- Zhen Yan (ORCID: https://orcid.org/0000-0002-2205-3635)
- Weiqiang Liu (ORCID: https://orcid.org/0000-0001-7717-6424)
Institutions
- Peking University (CN)
- Inner Mongolia University of Science and Technology (CN)
- Beijing University of Technology (CN)
- Advanced Technology & Materials (China) (CN)
- Baotou Research Institute of Rare Earths (CN)
Publication Details
- Journal
- Chinese Physics B
- Published
- 2025-05-19
- DOI
- https://doi.org/10.1088/1674-1056/adda0c
- Primary Topic
- Magnetic Properties of Alloys
- Type
- article
- Field-Weighted Citation Impact
- 0.00