Amorphous magnetic RE-Fe-Al alloys

Author

Kong, Hui Zi ; Ding, Jun ; Wang, Lan ; Li, Yi

Author_Institution

Dept. of Mater. Sci., Nat. Univ. of Singapore, Singapore

Volume

37

Issue

4

fYear

2001

fDate

7/1/2001 12:00:00 AM

Firstpage

2500

Lastpage

2502

Abstract

Detail studies of the effects of rare-earth substitution on the magnetic properties of bulk amorphous hard magnetic Nd₆₀Fe ₃₀Al₁₀ alloys were carried out. Amorphous ribbons of alloys RE₆₀Fe₃₀Al₁₀ (with RE=Nd,Sm,Gd and Dy) were prepared by melt-spinning at 30 m/s. As temperature increases, instead of just a simple transition from ferromagnetic state to paramagnetic state, these ribbons undergo a superparamagnetic stage that ranges over about 100 K. Ribbons of alloys RE₆₀Fe₃₀Al₁₀ with RE=Nd,Sm and Dy exhibit high values of coercivity (in MA/m) range at 4 K, while coercivity of ribbons of alloys with RE=Y and Gd remain low below 100 kA/m

Keywords

aluminium alloys; amorphous magnetic materials; coercive force; ferromagnetic materials; ferromagnetic-paramagnetic transitions; iron alloys; melt spinning; metallic glasses; rare earth alloys; superparamagnetism; Dy₆₀Fe₃₀Al₁₀; Gd₆₀Fe₃₀Al₁₀; Nd₆₀Fe₃₀Al₁₀; Sm₆₀Fe₃₀Al₁₀; amorphous alloy ribbon; cluster ferromagnetism; coercivity; ferromagnetic-paramagnetic transition; hard magnetic properties; melt spinning; rare earth substitution; superparamagnetism; Aluminum alloys; Amorphous magnetic materials; Amorphous materials; Iron alloys; Magnetic anisotropy; Magnetooptic recording; Neodymium; Perpendicular magnetic recording; Samarium alloys; Temperature;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.951215

Filename

951215