Frequency dependence of the giant magnetoimpedance in current annealed amorphous wires

  • Raposo V
  • García D
  • Zazo M
 et al. 
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Abstract

Frequency dependence in the range from 0.1 to 30 MHz of the giant magnetoimpedance effect (GMI) of DC current annealed iron-based amorphous wires is here presented. The as-cast amorphous samples presents a uniform increase of the phase angle between the real and imaginary part of the complex impedance with frequency. When annealing with increasing current density a clear peak of the phase angle is present, revealing the induction of circular anisotropy accompanied by and increase of the GMI percent. © 2003 Elsevier B.V. All rights reserved.

Author-supplied keywords

  • Amorphous wires
  • Giant magnetoimpedance

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