Asymmetric off-diagonal magnetoimpedance in field-annealed amorphous ribbons: Analysis of bias current effect

Magnetoimpedance in soft magnetic amorphous and nanostructured wires

“…All results show almost symmetrical curves with no appreciable hysteresis due to the fact that no dc bias current has been applied during measurements. The application of a dc bias current has been demonstrated to increase the asymmetry in the low field region [52]. This has the advantage of reducing the power consumption when a sensor based on this effect is built, but it reduces the linear part of the curve from zero up to the anisotropy field value.…”

Influence of current amplitude on the nonlinear asymmetric ac volt–ampere characteristics in amorphous ribbons with GMI effect

“…At the condition, the current frequency is very low and the skin effect in the ribbon can be neglected [18]. Now, the magnetic field h a2 can be expressed as [19] h a2 ðx;…”

“…Variation of the magnetization under the external field can be obtained by minimizing the free energy [19] E ¼ À …”

Influence of Magneto-Thermal Treatments on Longitudinally Driven Giant Magneto-Impedance Effect in Co-Fe-Si-B Amorphous Ribbons

“…Therefore, annealing treatment or altering materials' magneto-structure is usually adopted to improve GMI effect and magnetic sensors sensitivity. Much work have been done to demonstrate that GMI effect can be enhanced by improving domain configuration, magnetic anisotropy, soft magnetic properties and also driving mode [5][6][7][8].The GMI effect demonstrated two kinds of driving modes: circumferential driving mode and longitudinal driving mode [9]. Comparing with the former, the excitation current of the latter does not directly contact with the amorphous ribbon, which degrades the complexity of the structure and avoids the material Joule heat loss [10].…”