DocumentCode :
906634
Title :
Magnetic Sensor System Using Asymmetric Giant Magnetoimpedance Head
Author :
Yoon, Seok Soo ; Kollu, Pratap ; Kim, Dong Young ; Kim, Gun Woo ; Cha, Yongjun ; Kim, CheolGi
Author_Institution :
Dept. of Phys., Andong Nat. Univ., Andong
Volume :
45
Issue :
6
fYear :
2009
fDate :
6/1/2009 12:00:00 AM
Firstpage :
2727
Lastpage :
2729
Abstract :
Recently sensitive micro-magnetic sensors are strongly required in various technologies such as BT and IT. This paper gives the comprehensive analysis of the Asymmetric Giant MagnetoImpedance (AGMI) sensor´s performance with negative feedback. Asymmetrical behavior of the GMI is required for linear magnetic field sensors as the sensitivity and linearity for magnetic field are the most important parameters in the practical application of GMI to magnetic sensors, and this has been realized by magnetic field annealing in amorphous ribbon. A novel AGMI sensor was developed and the performance of the sensor was carefully studied with and without applying negative feedback. The sensor uses 10 mm times 1 mm times 20 mum Co66Fe4Si15B15 ribbon as a sensing element. On applying the negative feedback the sensor shows excellent linearity free from hysteresis, independent of temperature variations. The sensitivity AGMI sensor was found to be 0.27 V/Oe in dynamic range of -2 ~ 2 Oe.
Keywords :
amorphous magnetic materials; boron alloys; cobalt alloys; feedback; giant magnetoresistance; iron alloys; magnetic annealing; magnetic field measurement; magnetic heads; magnetic hysteresis; magnetic sensors; silicon alloys; soft magnetic materials; Co66Fe4Si15B15; amorphous ribbon; asymmetric giant magnetoimpedance head; asymmetric giant magnetoimpedance sensor; comprehensive analysis; hysteresis; linear magnetic field sensors; magnetic field annealing; micromagnetic sensors; negative feedback; Amorphous soft magnetic ribbon; magnetic sensor; magnetoimpedance; negative feedback;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.2009.2020538
Filename :
4957784
Link To Document :
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