Development of high sensitivity multi core MI element

Author

Hamada, N. ; Shimode, A. ; Cai, C. ; Yamamoto, M.

Author_Institution

Aichi Steel Corp., Tokai, Japan

fYear

2015

fDate

11-15 May 2015

Firstpage

1

Lastpage

1

Abstract

MI sensor is a magnetic sensor based on the Magneto Impedance (MI) effect discovered by Mori et al. in 1993^[1]. A small and highly sensitive magnetic sensor (AMI 306) based on above MI effect and used as an electromagnetic compass mainly in mobile phones and smart phones has been developed and commercialized by AICHI MICRO INTELLIGENT^[2]. According to theoretical analysis, the MI sensor is foreseen to show the fT/√Hz level of noise density[^3], and its performance would even be equal to SQUID. MI element (AMI306) with pickup coil fabricated by a plating process is used in electromagnetic compasses. Although it shows magnetic resolution in the micro Tesla order[^4], higher performance in sensitivity and noise level is required.

Keywords

magnetic noise; magnetic sensors; smart phones; MI sensor; electromagnetic compass; electromagnetic compasses; high sensitivity multicore MI element; magnetic resolution; magnetic sensor; magneto impedance effect; microTesla order; mobile phones; noise density; noise level; pickup coil; plating process; smart phones; Amorphous magnetic materials; Magnetic anisotropy; Magnetic cores; Magnetic hysteresis; Noise; Sensitivity; Wires;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference (INTERMAG), 2015 IEEE

Conference_Location

Beijing

Print_ISBN

978-1-4799-7321-7

Type

conf

DOI

10.1109/INTMAG.2015.7156660

Filename

7156660