| Title | A novel strategy for the fabrication of high-performance nanostructured Ce-Fe-B magnetic materials via electron-beam exposure |
| Authors | Zha, Liang Kim, Cholsong Yun, Chao Zhou, Dong Li, Wei Kong, Xiangdong Han, Li Yang, Wenyun Liu, Shunquan Han, Jingzhi Wang, Changsheng Du, Honglin Xia, Weixing Bollero, Alberto Yang, Jinbo |
| Affiliation | Peking Univ, Sch Phys, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China Cent Iron & Steel Res Inst, Funct Mat Res Inst, Beijing 100081, Peoples R China Chinese Acad Sci, Inst Elect Engn, Dept Micronano Fabricat Technol, Beijing 100190, Peoples R China Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Key Lab Magnet Mat & Devices, Ningbo 315201, Peoples R China IMDEA Nanosci, Div Permanent Magnets & Applicat, Madrid, Spain Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China Beijing Key Lab Magnetoelect Mat & Devices, Beijing 100871, Peoples R China |
| Keywords | GRAIN-BOUNDARY DIFFUSION RARE-EARTH-ELEMENTS HIGH-COERCIVITY REVERSAL CRYSTALLIZATION MICROSTRUCTURE BEHAVIOR |
| Issue Date | May-2021 |
| Publisher | SCIENCE CHINA-MATERIALS |
| 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. |
| URI | http://hdl.handle.net/20.500.11897/615326 |
| ISSN | 2095-8226 |
| DOI | 10.1007/s40843-020-1650-2 |
| Indexed | SCI(E) |
| Appears in Collections: | 物理学院 人工微结构和介观物理国家重点实验室 |
