Magnetic anneal anisotropy in amorphous alloys

Author

Luborsky, Fred E. ; Walter, John L.

Author_Institution

General Electric Company, Schenectady, NY, USA

Volume

13

Issue

2

fYear

1977

fDate

3/1/1977 12:00:00 AM

Firstpage

953

Lastpage

956

Abstract

The uniaxial magnetic anisotropy Kuinduced by a magnetic anneal has been determined, after stress relief, for a series of alloys given by (FeyNi1-y)80B20. For all of these alloys Kudepends on anneal temperature as predicted by directional order theory. The concentration dependence of Kuin these alloys is also consistent with directional order theory. The maximum Ku, corrected for its temperature dependence, occurs at the composition $y = 0.5$ . However, Kudoes not fall to zero at $y = 1$ as predicted if directional order is assumed to arise only from Fe-Ni pair ordering. These results are interpreted as suggesting a role of the glass former, boron, in the directional ordering, perhaps as an "interstitial." The interaction energy derived from the results is negative as expected for interactions leading to precipitation. Its large value of $\\approx -7.5 \\times 10^{-14}$ ergs corresponds to a critical temperature for precipitation of 3000 K.

Keywords

Amorphous magnetic materials/devices; Magnetic thermal factors; Amorphous magnetic materials; Amorphous materials; Anisotropic magnetoresistance; Annealing; Iron alloys; Magnetic anisotropy; Nickel alloys; Perpendicular magnetic anisotropy; Stress; Temperature dependence;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.1977.1059494

Filename

1059494