Calculations of Demagnetization Curves of Nd-Fe-B Magnets Based on Inhonogeneous Nucleation

Akimasa Sakuma; Shigeru Takeda

doi:10.1109/20.104511

Calculations of Demagnetization Curves of Nd-Fe-B Magnets Based on Inhonogeneous Nucleation

Akimasa Sakuma, Shigeru Takeda

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

Demagnetization curves of Nd-Fe-B magnets are evaluated being based on the micro-magnetics for inhomogeneous nucleation, by considering a magnetic planar defect. The inhomogeneous nucleation field, reduced due to the magnetic defect, is increased as an effect of the second anisotropy constant, K2 even though K1>4K2 is satisfied where Kl is the first anisotropy constant. Further, the demagnetization process under the condition where the spin structure is conical is also examined by letting -2K2<K1<0. The nucleation field in this case is also reduced due to the detect and is shown to increase as the angle of applied field goes up.

Original language	English
Pages (from-to)	1745-1747
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	26
Issue number	5
DOIs	https://doi.org/10.1109/20.104511
Publication status	Published - 1990 Sep
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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abstract = "Demagnetization curves of Nd-Fe-B magnets are evaluated being based on the micro-magnetics for inhomogeneous nucleation, by considering a magnetic planar defect. The inhomogeneous nucleation field, reduced due to the magnetic defect, is increased as an effect of the second anisotropy constant, K2 even though K1>4K2 is satisfied where Kl is the first anisotropy constant. Further, the demagnetization process under the condition where the spin structure is conical is also examined by letting -2K2<K1<0. The nucleation field in this case is also reduced due to the detect and is shown to increase as the angle of applied field goes up.",

author = "Akimasa Sakuma and Shigeru Takeda",

year = "1990",

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N2 - Demagnetization curves of Nd-Fe-B magnets are evaluated being based on the micro-magnetics for inhomogeneous nucleation, by considering a magnetic planar defect. The inhomogeneous nucleation field, reduced due to the magnetic defect, is increased as an effect of the second anisotropy constant, K2 even though K1>4K2 is satisfied where Kl is the first anisotropy constant. Further, the demagnetization process under the condition where the spin structure is conical is also examined by letting -2K2<K1<0. The nucleation field in this case is also reduced due to the detect and is shown to increase as the angle of applied field goes up.

AB - Demagnetization curves of Nd-Fe-B magnets are evaluated being based on the micro-magnetics for inhomogeneous nucleation, by considering a magnetic planar defect. The inhomogeneous nucleation field, reduced due to the magnetic defect, is increased as an effect of the second anisotropy constant, K2 even though K1>4K2 is satisfied where Kl is the first anisotropy constant. Further, the demagnetization process under the condition where the spin structure is conical is also examined by letting -2K2<K1<0. The nucleation field in this case is also reduced due to the detect and is shown to increase as the angle of applied field goes up.

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