Enhancement in the magneto-impedance (MI) effect of multi-ribbon

Author

Iida, S. ; Suzuki, D. ; Kambe, S. ; Ishii, O.

Author_Institution

Graduate Sch. of Sci. & Eng., Yamagata Univ., Yonezawa, Japan

Volume

36

Issue

5

fYear

2000

fDate

9/1/2000 12:00:00 AM

Firstpage

3661

Lastpage

3663

Abstract

This article describes the use of a magnetic ribbon to create a highly sensitive magnetic sensor. The sensor employs the impedance change in a magnetic ribbon when a radio frequency (RF) current is passed through it and an external magnetic field is applied. To achieve a highly sensitive magnetic sensor, we had to increase the impedance change. We examined stacked magnetic ribbons, each isolated with thin plastic sheets, and interpreted the results by calculating the impedances and relative current in each ribbon. The impedance change was enhanced by stacking the ribbons. However, the effective permeability, which greatly affects the sensitivity, decreased as the number of ribbons increased. Consequently, the double-layered structure provided the maximum sensitivity, which was about three times higher than that of a single-layered structure

Keywords

amorphous magnetic materials; electric impedance; giant magnetoresistance; magnetic multilayers; magnetic sensors; RF current; amorphous ribbons; double-layered structure; effective permeability; external magnetic field; highly sensitive magnetic sensor; impedance change; magnetic ribbon; magnetoimpedance effect enhancement; relative current; stacked ribbons; Amorphous magnetic materials; Amorphous materials; Conductive films; Impedance; Magnetic films; Magnetic sensors; Permeability; Plastics; Radio frequency; Stacking;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.908933

Filename

908933