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

Volume

34

Issue

4

fYear

1998

fDate

7/1/1998 12:00:00 AM

Firstpage

1339

Lastpage

1341

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 mv_pp/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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.706541

Filename

706541