Structural Characterization and Magnetoimpedance Effect of Current Annealed Co-Based Amorphous Ribbons at Different Ambient

The effect of current annealing in the air and vacuum on structure and magnetoimpedance (MI) response of Co 68.15 Fe 4.35 Si 12.5 B 15 amorphous ribbons was investigated. After 15 min of annealing, we found optimized currents where maximum MI ratio reached to 125 % and 160 % for annealing in the air...

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Bibliographic Details
Published in:Journal of superconductivity and novel magnetism 2015-01, Vol.28 (1), p.265-269
Main Authors: Moradi, Mehrdad, Hajiali, Mohammadreza, Khezri, Mahsa, Roozmeh, S. Ehsan, Mohseni, S. Majid
Format: Article
Language:English
Subjects:
Amorphous structure
Annealing
Characterization and Evaluation of Materials
Condensed Matter Physics
Magnetic Materials
Magnetic properties
Magnetism
Magnetoimpedance
Original Paper
Physics
Physics and Astronomy
Ribbons
Strongly Correlated Systems
Superconductivity
Thermal conductivity
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Summary:The effect of current annealing in the air and vacuum on structure and magnetoimpedance (MI) response of Co 68.15 Fe 4.35 Si 12.5 B 15 amorphous ribbons was investigated. After 15 min of annealing, we found optimized currents where maximum MI ratio reached to 125 % and 160 % for annealing in the air and vacuum, respectively. Sample structures and their magnetic properties were investigated to explain the MI response after the annealing. Variation of MI responses can be correlated to the difference in the thermal conductivity of air and vacuum, field-induced anisotropy, and surface changes.
ISSN:1557-1939
1557-1947
DOI:10.1007/s10948-014-2857-9