GMI effect in the low magnetostrictive alloys

Giant Magnetoimpedance Effect and AC Magnetic Susceptibility in Amorphous Alloys System of FeCoNbBSiCu

“…This behavior can be due to a possible magnetic hardening of the sample when the length is decreased. The magnetic domain configuration is strongly influenced by the demagnetizing field, because there is an increase in the demagnetization factor along the direction of the sample when the length is reduced; as it was explained by L. Goncalves et al [16] …”

“…In the same way, AC magnetic susceptibility has been mainly studied for Co-based alloys in wire form [15,16] The magnetic susceptibility is the magnetization degree of a material in response to an applied magnetic field. The susceptibility χ is defined by the following expression:…”

An electronic approach to homogenize the impedance phase characteristics of heterogeneous GMI sensors

“…The Giant Magnetoimpedance effect (GMI) began to be intensively studied in the 1990s. It was observed a huge impedance variation when a sample of a ferromagnetic amorphous material, excited by an alternating current, was submitted to an external magnetic field [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19].…”

“…The GMI phenomenon is induced by the application of an alternating current (I) along the length of amorphous ferromagnetic samples, which are submitted to an external magnetic field (H) [1][2][3][4][5][6]. The impedance of GMI samples changes as a function of H, as shown in Figure 1, and H can be inferred by measuring the difference of potential (V) between the extremities of the GMI sample.…”

Influence of quenching rate on the structural, soft magnetic and magnetoimpedance properties of melt-spun Co69Fe7Si14B10 alloy

“…The effect of various parameters such as composition, alloying addition, length of the sample, etc. on magnetoimpedance in Co-Fe-Si-B ribbons has been reported by various researchers [6][7][8][9][10]. Although there are several reports on the quenching rate dependence of soft magnetic properties, the effect of rapid quenching on MI and its correlation with the related soft magnetic properties is still elusive [11][12][13].…”