Title :
Magneto-impedance effect in etched thin amorphous wires
Author :
Yoshinga, T. ; Furukawa, S. ; Mohri, K.
Author_Institution :
R&D, UNITIKA Ltd., Uji, Japan
fDate :
9/1/1999 12:00:00 AM
Abstract :
The magneto-impedance (MI) effect is investigated in etched thin zero-magnetostrictive amorphous wires having 4.5-30 μm diameters. The MI effect gradually decreased with decreasing diameter and then the large Barkhausen effect appeared in thinner wires having 5-10 μm diameters. Longitudinal BH loops are measured and estimated the average anisotropy direction in each etched wire considering the anisotropy energy change. A sensitive MI field sensor is constituted using the etched wire head having 16 μm diameter and 0.7 mm length magnetized with a pulse current using CMOS multivibrator
Keywords :
Barkhausen effect; amorphous magnetic materials; cobalt alloys; etching; ferromagnetic materials; iron alloys; magnetic anisotropy; magnetic sensors; microsensors; (Co0.94Fe0.06)72.5Si12.5 B15; 0.7 mm; 16 micron; 4.5 to 30 micron; 5 to 10 micron; Barkhausen effect; CMOS multivibrator; MI field sensor; anisotropy energy change; average anisotropy direction; etched thin amorphous wires; etched wire head; longitudinal BH loops; magneto-impedance effect; pulse current; Amorphous magnetic materials; Amorphous materials; Anisotropic magnetoresistance; Energy measurement; Etching; Magnetic anisotropy; Magnetic field measurement; Magnetic sensors; Perpendicular magnetic anisotropy; Wires;
Journal_Title :
Magnetics, IEEE Transactions on
