A Novel Strategy for the Fabrication of High-Performance Nanostructured Ce-Fe-B Magnetic Materials via Electron-Beam Exposure

31 Pages Posted: 6 Oct 2020

See all articles by Liang Zha

Liang Zha

Peking University - State Key Laboratory for Mesoscopic Physics

Cholsong Kim

Peking University - State Key Laboratory for Mesoscopic Physics

Dong Zhou

Central Iron and Steel Research Institute (CISRI) - Functional Materials Research Institute

Wei Li

Central Iron and Steel Research Institute (CISRI) - Functional Materials Research Institute

Xiangdong Kong

Chinese Academy of Sciences (CAS) - Department of Micro-Nano Fabrication Technology

Li Han

Chinese Academy of Sciences (CAS) - Department of Micro-Nano Fabrication Technology

Wenyun Yang

Peking University - State Key Laboratory for Mesoscopic Physics

Shunquan Liu

Peking University - State Key Laboratory for Mesoscopic Physics

Jingzhi Han

Peking University - State Key Laboratory for Mesoscopic Physics

Changsheng Wang

Peking University - State Key Laboratory for Mesoscopic Physics

Honglin Du

Peking University - State Key Laboratory for Mesoscopic Physics

Weixing Xia

Chinese Academy of Sciences (CAS) - CAS Key Laboratory of Magnetic Materials and Devices

Alberto Bollero

IMDEA Nanoscience - Division of Permanent Magnets and Applications

Jinbo Yang

Peking University - State Key Laboratory for Mesoscopic Physics; Collaborative Innovation Centre of Quantum Matter

Abstract

Low magnetocrystalline anisotropy and energy product of the Ce 2 Fe 14 B compound severely restrict its application in permanent magnet applications, in spite of its potential as a novel permanent magnet alternative based on a widely abundant and inexpensive rare-earth (Cerium). A novel strategy combining melt-spinning and electron-beam exposure (EBE) aiming for fabricating high-performance Ce-Fe-B magnet is reported in this work. 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 process (RTP) method for the same precursor . This suggest that CeFeB materials using EBE could be a promising candidate after further processing, such as hot deforming or sintereing, to fill the performance “gap” between hexaferrite and Nd-Fe-B-based magnets. The enhanced intergranular magnetostatic coupling effect in EBE sample is further validated by mapping 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. Micromagnetic simulations are also performed to verify the pinning effect of grain boundary configuration in the Ce-Fe-B system.

Keywords: nanoscale magnets, rapid thermal annealing, Ce-Fe-B, magnetic properties, nanocrystalline material

Suggested Citation

Zha, Liang and Kim, Cholsong and Zhou, Dong and Li, Wei and Kong, Xiangdong and Han, Li and Yang, Wenyun and Liu, Shunquan and Han, Jingzhi and Wang, Changsheng and Du, Honglin and Xia, Weixing and Bollero, Alberto and Yang, Jinbo, A Novel Strategy for the Fabrication of High-Performance Nanostructured Ce-Fe-B Magnetic Materials via Electron-Beam Exposure. Available at SSRN: https://ssrn.com/abstract=3693591 or http://dx.doi.org/10.2139/ssrn.3693591

Liang Zha (Contact Author)

Peking University - State Key Laboratory for Mesoscopic Physics

Beijing, 100871
China

Cholsong Kim

Peking University - State Key Laboratory for Mesoscopic Physics

Beijing, 100871
China

Dong Zhou

Central Iron and Steel Research Institute (CISRI) - Functional Materials Research Institute

Beijing
China

Wei Li

Central Iron and Steel Research Institute (CISRI) - Functional Materials Research Institute

Beijing
China

Xiangdong Kong

Chinese Academy of Sciences (CAS) - Department of Micro-Nano Fabrication Technology ( email )

52 Sanlihe Rd.
Datun Road, Anwai
Beijing, Xicheng District 100864
China

Li Han

Chinese Academy of Sciences (CAS) - Department of Micro-Nano Fabrication Technology

52 Sanlihe Rd.
Datun Road, Anwai
Beijing, Xicheng District 100864
China

Wenyun Yang

Peking University - State Key Laboratory for Mesoscopic Physics

Beijing, 100871
China

Shunquan Liu

Peking University - State Key Laboratory for Mesoscopic Physics

Beijing, 100871
China

Jingzhi Han

Peking University - State Key Laboratory for Mesoscopic Physics ( email )

Beijing, 100871
China

Changsheng Wang

Peking University - State Key Laboratory for Mesoscopic Physics

Beijing, 100871
China

Honglin Du

Peking University - State Key Laboratory for Mesoscopic Physics

Beijing, 100871
China

Weixing Xia

Chinese Academy of Sciences (CAS) - CAS Key Laboratory of Magnetic Materials and Devices ( email )

Ningbo, 315201
China

Alberto Bollero

IMDEA Nanoscience - Division of Permanent Magnets and Applications

Jinbo Yang

Peking University - State Key Laboratory for Mesoscopic Physics ( email )

Beijing, 100871
China

Collaborative Innovation Centre of Quantum Matter ( email )

Beijing, 100871
China

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