Rare earth cobalt magnetic materials of the type Sm0.6R0.4-xR´xCO5[R=Gd, Dy and R´=Pr, Nd]

Author

Martis, R.J.J.

Author_Institution

University of Pittsburgh, Pittsburgh, PA.

Volume

15

Issue

6

fYear

1979

fDate

11/1/1979 12:00:00 AM

Firstpage

1760

Lastpage

1761

Abstract

SmCo5magnets exhibit temperature coefficient of magnetization of -0.04% per deg C between 0 and 200°C. Earlier studies have indicated that good temperature compensated magnetic materials may be prepared by replacing part of Sm in SmCo5with other heavy rare earth elements such as Gd and Dy. In the present study quaternaries of the type Sm0.6[(Gd,DY)0.4-x(Pr, Nd)x]Co5[x=0.1, 0.2, 0.3] have been investigated. These were prepared by induction melting of the respective metals. X-ray diffraction technique was used to determine the presence of single phase. Magnetic measurements were performed on aligned powders. Sm0.6Nd0.1DY0.3Co5was found to have the lowest value for temperature coefficient of magnetization α. Its magnetic properties are: $4\\pi M_{s}=9.12$ kG, $4\\pi M_{r}=8.76$ kG, $H_{ci}=3.1$ kOe and $H_{A}=95$ kOe at room temperature. The value of α = -0.0148% per deg C from 20 to 220°C. Results for other compositions and their systematic trends are discussed.

Keywords

Permanent magnet materials; Cobalt; Magnetic materials; Magnetic variables measurement; Magnetization; Magnets; Neodymium; Performance evaluation; Powders; Temperature; X-ray diffraction;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.1979.1060376

Filename

1060376