Influence of Gamma Irradiation and Annealing on a Co-Based Alloy by the Permeability Spectra Measurement

Author

Song, Hongbin ; Park, Dae-Gyu

Author_Institution

Korea Atomic Energy Res. Inst., Daejeon, South Korea

Volume

47

Issue

10

fYear

2011

Firstpage

2563

Lastpage

2565

Abstract

The effects of annealing and gamma irradiation on the magnetic properties of amorphous Co₆₆Fe₄B₁₅Si₁₅ alloys have been investigated by means of the changes of the permeability spectra. In general, there are no differences in the magnitude and shape of the real part of the permeability curves between as-quenched amorphous and gamma-irradiated samples. However, a drastic increase, caused by gamma irradiation, is observed in the magnitude of the imaginary part of the permeability. This can be attributed to another relaxation process by superposition due to the gamma-irradiation effect. The same trend was also found in the sample annealed at 380°C in vacuum and in open air under a field of 3 Oe, which has a maximum value of the permeability due to the presence of ultrasoft magnetic materials.

Keywords

amorphous magnetic materials; annealing; boron alloys; cobalt alloys; gamma-ray effects; giant magnetoresistance; iron alloys; magnetic permeability; magnetic relaxation; quenching (thermal); silicon alloys; soft magnetic materials; Co₆₆Fe₄B₁₅Si₁₅; amorphous alloys; annealing; as-quenched amorphous samples; cobalt-based alloy; gamma irradiation; gamma-irradiated samples; magnetic properties; permeability spectra; relaxation process; temperature 380 degC; ultrasoft magnetic materials; Annealing; Force; Magnetic properties; Magnetic resonance imaging; Metals; Permeability; Radiation effects; Amorphous alloys; annealing; gamma irradiation; giant magneto impedance (GMI);

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2011.2158573

Filename

6028132