Get access

Magnetization reversal process and peculiarities of giant magneto-impedance effect in amorphous ferromagnetic microwire with helical anisotropy

Authors

  • Nikolai A. Usov,

    Corresponding author
    1. Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation, Russian Academy of Sciences, (IZMIRAN), Troitsk, Moscow, Russia
    2. Magnetic and Cryoelectronic Systems Ltd. (IZMIRAN), Troitsk, Moscow, Russia
    • Corresponding author: e-mail usov@izmiran.ru, Phone: +7 495 8519746, Fax: +7 495 3340124

    Search for more papers by this author
  • Sergey A. Gudoshnikov

    1. Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation, Russian Academy of Sciences, (IZMIRAN), Troitsk, Moscow, Russia
    2. Magnetic and Cryoelectronic Systems Ltd. (IZMIRAN), Troitsk, Moscow, Russia
    Search for more papers by this author

Abstract

The micromagnetic simulation of the magnetization reversal process in a Co-rich microwire with a weak helical anisotropy under the influence of applied magnetic field and dc bias current has been carried out. It is shown that due to the influence of the magneto–elastic interaction in a wire with helical anisotropy, the change of the sign of the longitudinal magnetization component under the influence of the axial magnetic field leads to a subsequent jump of the circular magnetization component at some critical value of the applied magnetic field. This leads to a non-trivial behavior of the off-diagonal giant magneto-impedance (GMI) component of the wire as a function of applied magnetic field. The effect is confirmed experimentally for two Co-rich microwires, having significantly different amplitudes of the residual quenching stress.

Ancillary