中国物理B ›› 2003, Vol. 12 ›› Issue (11): 1305-1309.doi: 10.1088/1009-1963/12/11/321

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Domain structures of Nd13Fe80B7 magnets during HDDR process

赵义敏1, 张正义1, 庞智勇2, 韩圣浩2, 张臻蓉3, 韩宝善3   

  1. (1)Institute of Materials, University of Science and Technology Beijing, Beijing 100083, China; (2)School of Physics and Microelectronics, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China; (3)State Key Laboratory of Magnetism, Institute of Physics, and Center of Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China
  • 收稿日期:2003-05-20 修回日期:2003-08-08 出版日期:2003-11-16 发布日期:2005-03-16
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10074081) and by the National Key Basic Research and Development Programme of China (Grant No 2001CB610504).

Domain structures of Nd13Fe80B7 magnets during HDDR process

Zhang Zhen-Rong (张臻蓉)a, Pang Zhi-Yong (庞智勇)b, Zhao Yi-Min (赵义敏)c, Zhang Zheng-Yi (张正义)c, Han Sheng-Hao (韩圣浩)b, Han Bao-Shan (韩宝善)a   

  1. a  State Key Laboratory of Magnetism, Institute of Physics, and Center of Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China; b School of Physics and Microelectronics, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China; c Institute of Materials, University of Science and Technology Beijing, Beijing 100083, China
  • Received:2003-05-20 Revised:2003-08-08 Online:2003-11-16 Published:2005-03-16
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10074081) and by the National Key Basic Research and Development Programme of China (Grant No 2001CB610504).

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摘要： The domain structures of Nd_{13}Fe_{80}B_7 alloy at different stages of the HDDR process have been revealed using a magnetic force microscope. In the as-cast samples, the columnar crystals with easy axis perpendicular to one another are clearly characterized by their different domain structures. For the insufficient and sufficient HD treatment, an obvious change of domain structure occurs, which is related to the variation of composition and crystalline microstructure during the HD process. And for the samples after sufficient DR processing, it is confirmed that the configuration of the columnar crystals is retained by the detected domain structures.

Abstract: The domain structures of Nd$_{13}$Fe$_{80}$B$_7$ alloy at different stages of the HDDR process have been revealed using a magnetic force microscope. In the as-cast samples, the columnar crystals with easy axis perpendicular to one another are clearly characterized by their different domain structures. For the insufficient and sufficient HD treatment, an obvious change of domain structure occurs, which is related to the variation of composition and crystalline microstructure during the HD process. And for the samples after sufficient DR processing, it is confirmed that the configuration of the columnar crystals is retained by the detected domain structures.

Key words: magnetic domain structure, Nd-Fe-B, HDDR, magnetic force microscope (MFM)

中图分类号:  (Domain walls and domain structure)

  • 75.60.Ch
75.50.Bb (Fe and its alloys) 81.40.-z (Treatment of materials and its effects on microstructure, nanostructure, And properties)