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

The effects of annealing and gamma irradiation on the magnetic properties of amorphous Co 66 Fe 4 B 15 Si 15 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...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2011-10, Vol.47 (10), p.2563-2565
Main Authors: Song, H., Park, D. G.
Format: Article
Language:English
Subjects:
Amorphous alloys
Annealing
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Force
gamma irradiation
giant magneto impedance (GMI)
Magnetic properties
Magnetic resonance imaging
Materials science
Metals
Other topics in materials science
Permeability
Physics
Radiation effects
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Summary:The effects of annealing and gamma irradiation on the magnetic properties of amorphous Co 66 Fe 4 B 15 Si 15 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.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2011.2158573