中国物理B ›› 2001, Vol. 10 ›› Issue (9): 869-873.doi: 10.1088/1009-1963/10/9/319

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

REMARKABLE IMPROVEMENT OF THE COERCIVITY OF TbMn6Sn6 COMPOUND BY MELT-SPINNING PROCESS

赵鹏, 张绍英, 张宏伟, 阎阿儒, 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:2001-04-03 修回日期:2001-05-09 出版日期:2005-06-12 发布日期:2005-06-12
  • 基金资助:
    Project supported by the State Key Project of Fundamental Research and the National Natural Science Foundation of China (Grant No. 19804017).

REMARKABLE IMPROVEMENT OF THE COERCIVITY OF TbMn6Sn6 COMPOUND BY MELT-SPINNING PROCESS

Zhao Peng (赵鹏), Zhang Shao-ying (张绍英), Zhang Hong-wei (张宏伟), Yan A-ru (阎阿儒), 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:2001-04-03 Revised:2001-05-09 Online:2005-06-12 Published:2005-06-12
  • Supported by:
    Project supported by the State Key Project of Fundamental Research and the National Natural Science Foundation of China (Grant No. 19804017).

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摘要： The melt-spinning process has been carried out to improve the hard-magnetic properties of the TbMn6Sn6 compound. For the TbMn6Sn6 ribbons quenched at a rate of 40m/s and annealed at 545K for 30min, the highest coercivity of about 0.6T is achieved at room temperature, which is much higher than that of the TbMn6Sn6 ingot. Both the ingot and the ribbon coercivities will increase with decreasing temperature. For ribbons, a greater improvement of coercivity has been made at lower temperatures. Microstructural studies show the uniform nanocrystalline distribution in the TbMn6Sn6 ribbons and a small amount of Tb-rich phase in grain boundaries. The observed remarkable improvement of magnetic hardening in ribbons is believed to arise from the uniform nanoscale microstructure and the domain-wall pinning at the grain boundaries.

Abstract: The melt-spinning process has been carried out to improve the hard-magnetic properties of the TbMn6Sn6 compound. For the TbMn6Sn6 ribbons quenched at a rate of 40m/s and annealed at 545K for 30min, the highest coercivity of about 0.6T is achieved at room temperature, which is much higher than that of the TbMn6Sn6 ingot. Both the ingot and the ribbon coercivities will increase with decreasing temperature. For ribbons, a greater improvement of coercivity has been made at lower temperatures. Microstructural studies show the uniform nanocrystalline distribution in the TbMn6Sn6 ribbons and a small amount of Tb-rich phase in grain boundaries. The observed remarkable improvement of magnetic hardening in ribbons is believed to arise from the uniform nanoscale microstructure and the domain-wall pinning at the grain boundaries.

Key words: melt-spinning process, nanoscale microstructure, coercivity

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

  • 75.60.Ej
81.20.-n (Methods of materials synthesis and materials processing) 75.60.Ch (Domain walls and domain structure) 75.60.Nt (Magnetic annealing and temperature-hysteresis effects) 81.40.Gh (Other heat and thermomechanical treatments)