Hysteretic giant magneto impedance

Abstract

Giant magneto impedance (GMI) has been measured in Fe77.5Si13.5B9 wires and Co67Fe3Cr3Si15B12 ribbons. The samples were annealed in order to induce specific anisotropies. An hysteretic behavior of the GMI is observed in both cases. Results show that this hysteretic behavior is related to irreversible changes in the magnetization processes of the samples.

Ultra-soft magnetic properties and giant magneto-impedance of Co68Fe4.5Si12·5B15

“…The GMI curve for this sample shows two peaks located near the anisotropy field, as has been observed in previous studies [23][24][25]. Hysteresis effect of GMI is correlated with the change of magnetization process [23].…”

Giant magneto‐impedance effect in thin Finemet nanocrystalline microwires

“…These latter materials generally require large fields to obtain a GMR response of a few percent, whereas the MI materials can produce responses of a few hundred of a percent in very small magnetic fields. It has also been reported [12] that under certain conditions the MI effect does not exhibit hysteresis effects, as is the case with GMR materials; hysteresis is undesirable for sensor applications. The latest development of industrial applications required miniaturization of the magnetic sensors.…”

Ultrathin Nanocrystalline Magnetic Wires

“…(i) in-rotating-water quenched ones, usually referred to as "conventional" amorphous wires [6][7][8][9], and (ii) glass-coated ones, referred to as glass-coated or glass-covered amorphous microwires [10][11][12].…”