Magnetic properties of Ga doped NdFeCoB sintered magnets

Author

Liu, J.F. ; Pan, S.N. ; Luo, H.L. ; Nie, X.F. ; Hou, D.L.

Author_Institution

Inst. of Phys., Chinese Acad. of Sci., Beijing, China

Volume

26

Issue

5

fYear

1990

fDate

9/1/1990 12:00:00 AM

Firstpage

2640

Lastpage

2642

Abstract

The magnetic properties of Nd₁₆Fe₇₇B₇ and Nd₁₆Fe_(61-x)Co₁₆Ga_xB₇ (x=0, 1, 2, 4, 7) have been measured. It was found that the remanent magnetization (B_r), the maximum energy product (BH)_max, and the Curie temperature (T_C) decrease with increasing Ga content. The coercive field (H_c) increases with increasing Ga content when x is smaller than 2, but decreases when x>2. At x=2, the coercive field reaches its maximum value. It was also found in all the samples investigated that there is a linear relationship between H_c^1/2 and T^2/3, which cannot be explained by Gaunt´s wall-barrier model. The temperature dependence of the calculated values of H₀ and (4bf) is examined

Keywords

Curie temperature; boron alloys; cobalt alloys; coercive force; ferromagnetic properties of substances; gallium alloys; iron alloys; neodymium alloys; permanent magnets; remanence; Curie temperature; Ga content; Gaunt´s wall-barrier model; Nd₁₆Fe_(61-x)Co₁₆Ga_xB ₇; Nd₁₆Fe₇₇B₇; coercive field; ferromagnet; magnetic properties; maximum energy product; remanent magnetization; sintered magnets; temperature dependence; Coercive force; Iron; Lattices; Magnetic field measurement; Magnetic materials; Magnetic properties; Magnets; Physics; Saturation magnetization; Temperature;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.104824

Filename

104824