Title :
Evaluation of zero-speed sensor using NiFe/CoFe multilayer thin films and twisted FeCoV wires
Author :
Takemura, Y. ; Nishimoto, M. ; Aoki, T. ; Yamada, T.
Author_Institution :
Yokohama Nat. Univ., Japan
Abstract :
The fabrication and characterization of magnetic sensors consisting of double magnetic layers are described. Both thin film based material and wire based materials were used for the double layers. The sensor elements were fabricated by patterning NiFe/CoFe multilayer thin films. This thin film based sensor exhibited a constant output voltage per excitation magnetic field at frequencies down to 0.1 Hz. The magnetic sensor using a twisted FeCoV wire, the conventional material for the Wiegand effect, had the disadvantage of an asymmetric output voltage generated by an alternating magnetic field. It was found that the magnetic wire whose ends were both slightly etched exhibited a symmetric output voltage.
Keywords :
cobalt alloys; iron alloys; magnetic multilayers; magnetic sensors; magnetic thin films; nickel alloys; vanadium alloys; wires; FeCoV; NiFe-CoFe; Wiegand effect; alternating magnetic field; asymmetric output voltage; double magnetic layers; magnetic sensors; multilayer thin films; nickel-iron/cobalt-iron thin films; twisted iron-cobalt-vanadium wires; zero-speed sensor; Fabrication; Magnetic materials; Magnetic multilayers; Magnetic sensors; Nonhomogeneous media; Sensor phenomena and characterization; Thin film sensors; Transistors; Voltage; Wire;
Conference_Titel :
Sensors, 2004. Proceedings of IEEE
Print_ISBN :
0-7803-8692-2
DOI :
10.1109/ICSENS.2004.1426365
