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Chin. Phys. B, 2014, Vol. 23(4): 047501    DOI: 10.1088/1674-1056/23/4/047501

Magnetic properties of bulk polycrystalline Pr1-xNdx (x=0, 0.8)FeB permanent magnets

He Yong-Zhoua, Wu Hong-Pingb, Zou Zhi-Qiangc
a Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China;
b Zhejiang Innuovo Magnet Co., Ltd., Dongyang 322118, China;
c Shanghai Jiaotong University, Shanghai 200240, China
Abstract  For spin reorientation (SRT), the applications of sintering NdFeB permanent magnets are limited at low temperature. The sintering PrFeB permanent magnet (PM) presents no SRT and shows excellent magnetic properties at low temperature. The magnetic properties of bulk polycrystalline sintering Pr1-xNdxFeB (x=0 and 0.8 correspond to P42H and N50M respectively) are studied in this paper. The results show that magnetic properties and stability of N50M are better than those of 42H at room temperature. With the decrease of temperature, the parameters of Br, Hcb, and Hci of P42H present a nearly linear increasing trend; Br and Hcb of N50M first increase and then decline, Hci presents an increasing trend. At 77 K, Br, Hci, and Jr of P42H are increased by 18.7%, 308%, and 17.1% respectively over than those at 300 K; at 120 K, Br, Hci, and Jr of N50M are increased by about 16.19%, 245%, and 12.6% respectively over than those at 300 K. The magnetic properties of P42H are better than those of N50M at low temperature. The sintering PrFeB is the preferred PM in various low-temperature devices.
Keywords:  PrFeB      NdFeB      bulk polycrystalline      magnetic properties  
Received:  31 July 2013      Revised:  18 August 2013      Accepted manuscript online: 
PACS:  75.50.Ww (Permanent magnets)  
  75.90.+w (Other topics in magnetic properties and materials)  
  41.85.Lc (Particle beam focusing and bending magnets, wiggler magnets, and quadrupoles)  
Fund: Project supported by the Natural Science Foundation of Shanghai, China (Grant No. 11ZR1445500) and the National Natural Science Foundation of China (Grant No. 11175238).
Corresponding Authors:  He Yong-Zhou     E-mail:
About author:  75.50.Ww; 75.90.+w; 41.85.Lc

Cite this article: 

He Yong-Zhou, Wu Hong-Ping, Zou Zhi-Qiang Magnetic properties of bulk polycrystalline Pr1-xNdx (x=0, 0.8)FeB permanent magnets 2014 Chin. Phys. B 23 047501

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