Hard magnetic properties of the rapidly quenched Sm(Co-Fe-B)5alloy ribbons

Author

Saito, H. ; Takahashi, M. ; Wakiyama, T.

Author_Institution

Tohoku University, Sendai, Japan

Volume

23

Issue

5

fYear

1987

fDate

9/1/1987 12:00:00 AM

Firstpage

2725

Lastpage

2727

Abstract

The structure and hard magnetic properties of the rapidly quenched SmCo5-xBx( $0 \\leq x \\leq 1$ ) and Sm(Co1-xFex)4B ( $0 \\leq x \\leq 0.74$ ) alloy ribbons fabricated under various quenching rates were systematically examined. Metastable states, such as CaCu5type disordered structure and amorphous state were found in a wide composition range, $0.6 \\leq x \\leq 1.0$ for SmCo5-xBxand $0 \\leq x \\leq 0.5$ for Sm(Co1-xFex)4B in the ribbons fabricated under high quenching rate. The maximum Value ofiHc(>18kOe) was obtained for ribbons which consist of the CaCu5disordered structure as a single phase. Furthermore, in the case of CaCu5disordered structure, the value of Tcremarkably increased with increasing Fe and decreasing B content. (SmCo4B (Tc=197°C) → SmCo4.4B0.6(Tc=557°C)/Sm(Co0.5Fe0.5)4B (Tc=472°C)). The value of M(Hex=18kOe) also increased with increasing Fe and decreasing B content. It was concluded that the formation of CaCu5type disordered Sm(Co-Fe-B)5compound with high Fe and low B content was considered to be effective to improve the hard magnetic properties of Sm-Co based alloys.

Keywords

Magnetic thermal factors; Permanent magnet materials; Amorphous magnetic materials; Amorphous materials; Argon; Iron; Magnetic anisotropy; Magnetic field measurement; Magnetic properties; Perpendicular magnetic anisotropy; Superlattices; X-ray diffraction;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.1987.1065237

Filename

1065237