Magnetic and Mössbauer investigation of amorphous (FexNi1-x)80B20alloys

Author

Sostarich, M. ; Dey, S. ; Deppe, P. ; Rosenberg, M. ; Czjzek, G. ; Oestreich, V. ; Schmidt, H. ; Luborsky, F.E.

Author_Institution

Ruhr-Universität, Bochum, West Germany

Volume

17

Issue

6

fYear

1981

fDate

11/1/1981 12:00:00 AM

Firstpage

2612

Lastpage

2614

Abstract

A Mössbauer and magnetic study of the amorphous systems (FexNi1-x)80B20and (FexNi1-x)80B19Si1in the temperature range 4.2 - 300 K has been undertaken. Besides the average hyperfine fields at the iron sites, in three cases⁶¹Ni average hyperfine fields have also been determined. It is concluded that at high Ni concentrations the atomic magnetic moments for both Fe and Ni decrease, the latter decreasing stronger and collapsing close to Ni80B20. The ratio D/Tc, with D the spin wave stiffness constant obtained from the coefficient B of the Bloch law which describes satisfactorily the low temperature dependence of the saturation magnetization and hyperfine fields, has a rather pronounced discontinuity between 30 and 40 at% Ni, possibly due to some changes in the short range order.

Keywords

Amorphous magnetic materials; Magnetic thermal factors; Mossbauer spectroscopy; Amorphous magnetic materials; Amorphous materials; Crystallization; Electrons; Iron alloys; Magnetic cores; Magnetic moments; Magnetic separation; Magnetization; Temperature dependence;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.1981.1061765

Filename

1061765