中国物理B ›› 2004, Vol. 13 ›› Issue (7): 1144-1148.doi: 10.1088/1009-1963/13/7/032

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Magnetic properties and coercivity mechanism of precipitation-hardened Gd－Co based ribbons

荣传兵, 张健, 杜晓波, 张宏伟, 张绍英, 沈保根   

  1. State Key Laboratory of Magnetism, Institute of Physics and Centre for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China
  • 收稿日期:2003-11-27 修回日期:2003-12-25 出版日期:2004-07-05 发布日期:2005-07-05
  • 基金资助:
    Project supported by the National High Technology Development Programme of China (Grant No 2001AA324019).

Magnetic properties and coercivity mechanism of precipitation-hardened Gd－Co based ribbons

Rong Chuan-Bing (荣传兵), Zhang Jian (张健), Du Xiao-Bo (杜晓波), Zhang Hong-Wei (张宏伟), Zhang Shao-Ying (张绍英), Shen Bao-Gen (沈保根)   

  1. State Key Laboratory of Magnetism, Institute of Physics and Centre for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China
  • Received:2003-11-27 Revised:2003-12-25 Online:2004-07-05 Published:2005-07-05
  • Supported by:
    Project supported by the National High Technology Development Programme of China (Grant No 2001AA324019).

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摘要： Gd(Co_{0.88-x}Cu_xFe_{0.09}Zr_{0.03})_z ribbons with x=0.075-0.200 and z=6.4－7.7 have been prepared by a melt-spinning technique. A cellular microstructure consisting of 2:17 cells surrounded by the 1:5 cell boundary phase is obtained after precipitation hardening. The dependence of room temperature coercivity on the heat treatment process suggests that the long-time isothermal aging is not helpful for the development of magnetic properties. Positive temperature coefficient of remanence from room temperature to about 673K is typical for all samples, while positive temperature coefficient of coercivity is obtained only in ribbons with low Cu content. The coercivity mechanism of the precipitation-hardened ribbons at different temperatures is also discussed.

关键词: precipitation hardening, high-temperature magnetic properties, coercivity mechanism

Abstract: Gd(Co$_{0.88-x}$Cu$_x$Fe$_{0.09}$Zr$_{0.03})_z$ ribbons with x=0.075-0.200 and z=6.4－7.7 have been prepared by a melt-spinning technique. A cellular microstructure consisting of 2:17 cells surrounded by the 1:5 cell boundary phase is obtained after precipitation hardening. The dependence of room temperature coercivity on the heat treatment process suggests that the long-time isothermal aging is not helpful for the development of magnetic properties. Positive temperature coefficient of remanence from room temperature to about 673K is typical for all samples, while positive temperature coefficient of coercivity is obtained only in ribbons with low Cu content. The coercivity mechanism of the precipitation-hardened ribbons at different temperatures is also discussed.

Key words: precipitation hardening, high-temperature magnetic properties, coercivity mechanism

中图分类号:  (Magnetization curves, hysteresis, Barkhausen and related effects)

  • 75.60.Ej
81.40.Rs (Electrical and magnetic properties related to treatment conditions) 81.40.Cd (Solid solution hardening, precipitation hardening, and dispersion hardening; aging) 81.20.-n (Methods of materials synthesis and materials processing) 81.40.Gh (Other heat and thermomechanical treatments)