Title :
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
fDate :
9/1/1989 12:00:00 AM
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 Nd16Fe77B7-xGax 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 Nd13.5 Dy1.5Fe75Al2B8 (iHc=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;
Journal_Title :
Magnetics, IEEE Transactions on
