Study of the coercivity for Nd-Fe-B-Ga sintered magnets

Author

Hu, Jifan ; Wang, Zhenxi ; Wang, Yizhong ; Zhao, Jiangao ; Rao, Xiaolei ; Zhang, Naning

Author_Institution

Inst. of Phys., Acad. Sinica, Beijing, China

Volume

25

Issue

5

fYear

1989

fDate

9/1/1989 12:00:00 AM

Firstpage

3429

Lastpage

3430

Abstract

The Ga-composition dependence of the Curie temperature, the anisotropy field, and the coercivity are studied for Nd-Fe-B-Ga sintered magnets. It is shown that a smaller addition of Ga atoms increases not only the Curie temperature but also the coercivity. A rise in coercivity does not result from the change of anisotropy field for Nd₁₆Fe₇₇B_7-xGa_x sintered magnets. It is also found that the coercivity for a Nd₁₆Fe ₇₇Ga₂B₅ magnet, which has lower B content, is controlled by nucleation whereas for the magnet Nd_13.5Dy_1.5Fe₇₅Al₂B₈ (iH_c=18 kOe), two kinds of coercivity mechanisms (pinning and nucleation) coexist

Keywords

Curie temperature; boron alloys; coercive force; ferromagnetic properties of substances; gallium alloys; iron alloys; magnetic anisotropy; neodymium alloys; permanent magnets; sintering; Curie temperature; NdFeBGa sintered magnet; anisotropy field; coercivity; nucleation; permanent magnet; pinning; Anisotropic magnetoresistance; Argon; Artificial intelligence; Atmosphere; Coercive force; Heat treatment; Magnets; Powders; Temperature dependence; Temperature sensors;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.42324

Filename

42324