中国物理B ›› 2014, Vol. 23 ›› Issue (4): 47501-047501.doi: 10.1088/1674-1056/23/4/047501

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

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

何永周a, 吴红平b, 邹志强c   

  1. 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
  • 收稿日期:2013-07-31 修回日期:2013-08-18 出版日期:2014-04-15 发布日期:2014-04-15
  • 基金资助:
    Project supported by the Natural Science Foundation of Shanghai, China (Grant No. 11ZR1445500) and the National Natural Science Foundation of China (Grant No. 11175238).

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

He Yong-Zhou (何永周)a, Wu Hong-Ping (吴红平)b, Zou Zhi-Qiang (邹志强)c   

  1. 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
  • Received:2013-07-31 Revised:2013-08-18 Online:2014-04-15 Published:2014-04-15
  • Contact: He Yong-Zhou E-mail:heyongzhou@sinap.ac.cn
  • About author:75.50.Ww; 75.90.+w; 41.85.Lc
  • Supported by:
    Project supported by the Natural Science Foundation of Shanghai, China (Grant No. 11ZR1445500) and the National Natural Science Foundation of China (Grant No. 11175238).

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摘要： 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.

关键词: PrFeB, NdFeB, bulk polycrystalline, magnetic properties

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.

Key words: PrFeB, NdFeB, bulk polycrystalline, magnetic properties

中图分类号:  (Permanent magnets)

  • 75.50.Ww
75.90.+w (Other topics in magnetic properties and materials) 41.85.Lc (Particle beam focusing and bending magnets, wiggler magnets, and quadrupoles)