Bi-Directional Giant Magneto Impedance Sensor


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 mm2 compact double-spiral structure.

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H. Uppili and B. Daglen, "Bi-Directional Giant Magneto Impedance Sensor," Advances in Materials Physics and Chemistry, Vol. 3 No. 5, 2013, pp. 249-254. doi: 10.4236/ampc.2013.35036.

Conflicts of Interest

The authors declare no conflicts of interest.


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