Effects of the grain alignment on the coercivity and its angular dependence for NdCoFeB permanent magnets

The dependence of the macroscopic magnetism for NdCoFeB permanent magnet on the degree of grain alignment has been studied. With an increase in grain alignment degree, the coercivity of the permanent magnet decreases and the remanence increases. The decrease rate of the coercivity is smaller than th...

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Bibliographic Details
Published in:Chinese science bulletin 1998, Vol.43 (2), p.107-111
Main Authors: Gao, Ruwei, Li, Wei, Ji, Changguo, Zhang, Deheng, Zhang, Jiancheng
Format: Article
Language:English
Subjects:
Alignment
angular
Coercivity
dependence
field
Field theory
grain
Magnetism
magnets
NdCoFeB
Permanent magnets
Remanence
sintered
starting
theory
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Summary:The dependence of the macroscopic magnetism for NdCoFeB permanent magnet on the degree of grain alignment has been studied. With an increase in grain alignment degree, the coercivity of the permanent magnet decreases and the remanence increases. The decrease rate of the coercivity is smaller than the increase rate of the remanence. The coercivity Hc(θ) increases with increasing angle θ between the applied field and the texture axis, and for the permanent magnets with good grain alignment the increase rate of Hc(θ) is large. These experimental results can be interpreted by using the starting field theory of coercivity.
ISSN:1001-6538
2095-9273
1861-9541
2095-9281
DOI:10.1007/BF02883918