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Chin. Phys. B, 2018, Vol. 27(7): 077504    DOI: 10.1088/1674-1056/27/7/077504

Magnetic properties of misch-metal partially substituted Nd-Fe-B magnets sintered by dual alloy method

Jie-Fu Xiong(熊杰夫)1,2, Rong-Xiang Shang(商荣翔)1,2, Yan-Li Liu(刘艳丽)1,2, Xin Zhao(赵鑫)1,2, Wen-Liang Zuo(左文亮)1,2, Feng-Xia Hu(胡凤霞)1,2, Ji-Rong Sun(孙继荣)1,2, Tong-Yun Zhao(赵同云)1,2, Ren-Jie Chen(陈仁杰)3, Bao-Gen Shen(沈保根)1,2
1 State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China;
3 Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
Abstract  The misch-metal (MM) partially substituted Nd-Fe-B sintered magnets were fabricated by the dual alloy method, and the crystal structure, microstructure, and magnetic properties were analyzed comprehensively. X-ray diffraction (XRD) reveals that the increasing content of the MM has an inconsiderable effect on the crystallographic alignment of the magnets. Grains of the two main phases are uniformly distributed, and slightly deteriorate on the grain boundary. Due to the diffusion between the adjacent grains, the MM substituted Nd-Fe-B magnets contain three types of components with different Ce/La concentrations. Moreover, the first-order reversal curve (FORC) diagram is introduced to analyze the magnetization reversal process, coercivity mechanism, and distribution of reversal field in magnetic samples. The analysis indicates that there are two major reversal components, corresponding to the two different main phases. The domain nucleation and growth are determined to be the leading mechanism in controlling the magnetization reversal processes of the magnets sintered by the dual alloy method.
Keywords:  misch-metal      first order reversal curve      the dual alloy method      magnetization reversal process  
Received:  22 March 2018      Revised:  14 April 2018      Accepted manuscript online: 
PACS:  75.60.Ej (Magnetization curves, hysteresis, Barkhausen and related effects)  
  75.60.Jk (Magnetization reversal mechanisms)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 51590880), the National Key Research and Development Program of China (Grant Nos. 2014CB643702 and 2016YFB0700903), Key Research Program of the Chinese Academy of Sciences of China, and the Inner Mongolia Science and Technology Major Project of China 2016.
Corresponding Authors:  Bao-Gen Shen     E-mail:

Cite this article: 

Jie-Fu Xiong(熊杰夫), Rong-Xiang Shang(商荣翔), Yan-Li Liu(刘艳丽), Xin Zhao(赵鑫), Wen-Liang Zuo(左文亮), Feng-Xia Hu(胡凤霞), Ji-Rong Sun(孙继荣), Tong-Yun Zhao(赵同云), Ren-Jie Chen(陈仁杰), Bao-Gen Shen(沈保根) Magnetic properties of misch-metal partially substituted Nd-Fe-B magnets sintered by dual alloy method 2018 Chin. Phys. B 27 077504

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