High-field magnetization measurements on a ferromagnetic amorphous alloy from 295 to 5 K

Author

Szymczak, Piotr ; Graham, C.D., Jr. ; Gibbs, M.R.J.

Author_Institution

Warsaw Univ., Poland

Volume

30

Issue

6

fYear

1994

fDate

11/1/1994 12:00:00 AM

Firstpage

4788

Lastpage

4790

Abstract

Magnetization measurements on an amorphous ferro-magnetic magnetic ahoy Fe₇₈(SiB)₂₂ have been made over the temperature range from 5 to 295 K and in fields to 5 T, using a SQUID magnetometer and a superconducting magnet. As-received and field-annealed samples were measured. Having data over a range of temperatures allows the spin-wave contribution to the magnetization to be determined, and then subtracted. When the spin-wave contribution is removed, a substantial high-field susceptibility remains, which is independent of temperature. Attempts to fit the corrected curves to one of two theoretical equations were not conclusive, but the best fit seems to be to M=M₀+aH^-0.5+bH. The annealing treatment has no significant effect on the high-field magnetization

Keywords

amorphous magnetic materials; boron alloys; ferromagnetic materials; iron alloys; magnetic annealing; magnetic susceptibility; magnetisation; silicon alloys; spin waves; 5 T; 5 to 295 K; Fe₇₈(SiB)₂₂; SQUID magnetometry; annealing treatment; corrected curves; ferromagnetic amorphous alloy; field-annealed samples; high-field magnetization; high-field susceptibility; spin-wave contribution; Amorphous magnetic materials; Amorphous materials; Annealing; Equations; Iron; Magnetic field measurement; Magnetization; SQUID magnetometers; Superconducting magnets; Temperature distribution;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.334222

Filename

334222