Abstract
The influences of applied magnetic field direction and amplitude during direct current-field annealing of Co68.5Fe4.35B12.5Si15 wire on giant magnetoimpedance (GMI) and magnetic properties have been studied. This annealing process causes a complex domain structure due to the existence of the external static magnetic field and internal circumferential field. We have shown that the applied magnetic field with different directions and amplitudes during passing the current through the wire modifies the magnetic properties and the GMI response. For instance, the sample annealed in the field perpendicular to the wire to cancel out the earth’s magnetic field shows a maximum GMI value as 570 % and saturation magnetization of M s = 86.5 emu/g. In contrast, the sample annealed without external magnetic field (the earth’s magnetic field exists) shows GMImax = 485 % and M s = 80.5 emu/g and in as-quenched wire, GMImax = 460 % and M s = 78.5 emu/g.
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Acknowledgments
R. Mardani would like to thank Dr. A. Jazayeri Gharebagh, ACECR-Technology Development Institute, Iran, for the preparation of the test samples. Moreover, he thank M. Rasuli, Birjand University, Iran, for his help in testing and in the measurements.
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Mardani, R., Amirabadizadeh, A., Ghanaatshoar, M. et al. The Influence of Magnetic Field Direction and Amplitude in Direct Current-Field Annealing on the Magnetoimpedance of Co-Based Wires. J Supercond Nov Magn 28, 2441–2446 (2015). https://doi.org/10.1007/s10948-015-3051-4
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DOI: https://doi.org/10.1007/s10948-015-3051-4