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Plate domain structure of sintered NdFeB magnets and dependence on compacting mode

Published online by Cambridge University Press:  31 January 2011

Zhen Rong Zhang
Affiliation:
State Key Laboratory of Magnetism, Institute of Physics, and Center of Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, People's Republic of China
Bao Shan Han
Affiliation:
State Key Laboratory of Magnetism, Institute of Physics, and Center of Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, People's Republic of China
Ye Qing He
Affiliation:
Beijing Zhong Ke San Huan High-Tech Co., Ltd., Beijing 100080, People's Republic of China
Shou Zeng Zhou
Affiliation:
State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, People's Republic of China
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Abstract

The alignment degree of sintered Nd–Fe–B magnets and its dependence on applied field and compacting mode were studied by magnetic force microscopy. By analyzing the magnetic force images to illustrate the magnetic-domain structure, an experimental method for quantitatively evaluating the alignment degree of sintered Nd–Fe–B magnets was given. The results show that if the compacting mode is the same, the alignment of magnets will be better as field increases. Under the same field, the alignment degree for rubber isostatic pressing with vibration is better than that for nonmagnetic metal die pressing. However, if the sample is compacted by rubber isostatic pressing without vibration, the alignment degree decreases significantly.

Type
Articles
Copyright
Copyright © Materials Research Society 2001

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