Title :
A new giant magneto-impedance head using magnetic microstrip lines
Author :
Jiang, Nianhua ; Yamakawa, Kiyoshi ; Honda, Naoki ; Ouchi, Kazuhiro
Author_Institution :
Akita Res. Inst. of Adv. Technol., Japan
fDate :
7/1/1998 12:00:00 AM
Abstract :
The performance of a novel magneto-impedance (MI) sensor head is described. The sensor is based on a magnetic microstrip line whose transmission impedance changes due to the permeability variation induced in the magnetic strip by external fields. The effects of device geometry on the performance is examined. It is found that output signal increases with both higher carrier power and narrower strip width. A microsensor with magnetic strip dimensions of 5×20 μm demonstrated a high sensitivity of 6 mvpp/Oe and a broad bandwidth of 300 MHz at an input power of 1 mW
Keywords :
giant magnetoresistance; magnetic heads; magnetic microwave devices; magnetic permeability; magnetic sensors; magnetoresistive devices; microsensors; microstrip components; 1 mW; 20 mum; 300 MHz; 5 mum; broad bandwidth; carrier power; device geometry; external fields; giant magneto-impedance head; high sensitivity; input power; magnetic microstrip line; magnetic microstrip lines; magnetic strip; magnetic strip dimensions; magneto-impedance sensor head; microsensor; output signal; permeability variation; strip width; transmission impedance; Bandwidth; Geometry; Impedance; Magnetic heads; Magnetic sensors; Micromagnetics; Microsensors; Permeability; Sensor phenomena and characterization; Strips;
Journal_Title :
Magnetics, IEEE Transactions on
