Effects of torsion on the magnetoimpedance response of CoFeBSi amorphous wires
Por:
García K.L., García-Beneytez J.M., Valenzuela R., Zhukov A., González J., Vázquez M.
Publicada:
1 ene 2001
Resumen:
CoFeBSi amorphous wires prepared by the in-rotating-water quenching technique were submitted to torsion annealings by Joule heating. Their impedance response, Z, was measured in the giant magnetoimpedance arrangement in the 5 Hz-13 MHz frequency range and 0.2-22mA AC current amplitude. By comparison with as-cast wires of the same composition, a decrease in Z and an increase in the field irreversibility (at 1 MHz and 2 mA) were observed when submitted to axial DC magnetic fields of ± 40 Oe. The analysis of the real and imaginary components of inductance at f < 500kHz allowed the resolution of domain wall bulging from domain wall displacement. As compared with as-cast wires, torsion annealing produced a decrease in both processes. These results are consistently interpreted in terms of an induced magnetic anisotropy. © 2001 Elsevier Science B.V. All rights reserved.
Filiaciones:
García K.L.:
Instituto de Investigaciones en Materiales, National University of Mexico, P.O. Box 70-360, 04510 Mexico, DF, Mexico
García-Beneytez J.M.:
Instituto de Magnetismo Aplicado, UCM-CSIC, Madrid, Spain
Valenzuela R.:
Instituto de Investigaciones en Materiales, National University of Mexico, P.O. Box 70-360, 04510 Mexico, DF, Mexico
Zhukov A.:
Universidad Del Pais Vasco, San Sebastián, Spain
González J.:
Universidad Del Pais Vasco, San Sebastián, Spain
Vázquez M.:
Instituto de Magnetismo Aplicado, UCM-CSIC, Madrid, Spain
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