Bi-Directional Giant Magneto Impedance Sensor

Abstract

<span style="font-family:Verdana;color:black;font-size:10pt;">A thin film giant magneto impedance (GMI) based on magnetic field sensor has been developed using electrodeposited Ni-Fe permalloy. Chemical composition, surface morphology, and magnetic properties of Ni-Fe permalloy were char-acterized as a function of plateup parameters, and process conditions were established to deposit a Ni-Fe thin film with a high permeability (~1000) and a low coercivity (0.6 Oersted). Conventional GMI sensors are uni-directional and are several millimeters long. In this work, a spiral-shaped sensor using electroplated Ni-Fe permalloy to detect bi-directional magnetic field is reported. Excellent bi-directional magnetic field sensing has been demonstrated using the 1 mm</span><span style="font-family:Verdana;color:black;font-size:6.5pt;">2 </span><span style="font-family:Verdana;color:black;font-size:10pt;">compact double-spiral structure.</span

Magnetic Properties of Electroformed Ni and Ni-Fe for Micromagnetic MEMS Applications

“…10. We have achieved maximum relative permeability of 16,000, which is better than the permeability reported by Uppili and Daglen et al [21]. By a series of repetitive experiments, the identical compositional ratio of Ni-Fe could not attain for different current densities, therefore the experiment with different current density or relative permeability could not performed.…”

Study of the effect of magnetic fields on static degradation of Fe and Fe-12Mn-1.2C in balanced salts modified Hanks’ solution

“…In the case of FeAC ( Fig. 13 a), the induced currents limit the penetration of the magnetic field to the surface of the sample [ 69 ]. In Fig.…”