Magnetic sensor system using asymmetric giant magnetoimpedance head

Seok Soo Yoon; Pratap Kollu; Dong Young Kim; Gun Woo Kim; Yongjun Cha; Cheol Gi Kim

doi:10.1109/TMAG.2009.2020538

Magnetic sensor system using asymmetric giant magnetoimpedance head

Seok Soo Yoon, Pratap Kollu, Dong Young Kim, Gun Woo Kim, Yongjun Cha, Cheol Gi Kim

Department of Physics and Chemistry

Research output: Contribution to journal › Article › peer-review

38 Scopus citations

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 × 1 mm × 20 μm Co₆₆Fe₄Si₁₅B ₁₅ 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.

Original language	English
Article number	4957784
Pages (from-to)	2727-2729
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	45
Issue number	6
DOIs	https://doi.org/10.1109/TMAG.2009.2020538
State	Published - Jun 2009

Bibliographical note

Funding Information:
The authors gratefully acknowledge the financial support from the BK 21, KRF, and ETRI under Project 2006-S-074-02 to carry out the investigations.

Keywords

Amorphous soft magnetic ribbon
Magnetic sensor
Magnetoimpedance
Negative feedback

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10.1109/TMAG.2009.2020538

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title = "Magnetic sensor system using asymmetric giant magnetoimpedance head",

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 × 1 mm × 20 μm Co66Fe4Si15B 15 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 soft magnetic ribbon, Magnetic sensor, Magnetoimpedance, Negative feedback",

author = "Yoon, {Seok Soo} and Pratap Kollu and Kim, {Dong Young} and Kim, {Gun Woo} and Yongjun Cha and Kim, {Cheol Gi}",

note = "Funding Information: The authors gratefully acknowledge the financial support from the BK 21, KRF, and ETRI under Project 2006-S-074-02 to carry out the investigations.",

year = "2009",

month = jun,

doi = "10.1109/TMAG.2009.2020538",

language = "English",

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AU - Yoon, Seok Soo

AU - Kollu, Pratap

AU - Kim, Dong Young

AU - Kim, Gun Woo

AU - Cha, Yongjun

AU - Kim, Cheol Gi

N1 - Funding Information: The authors gratefully acknowledge the financial support from the BK 21, KRF, and ETRI under Project 2006-S-074-02 to carry out the investigations.

PY - 2009/6

Y1 - 2009/6

N2 - 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 × 1 mm × 20 μm Co66Fe4Si15B 15 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.

AB - 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 × 1 mm × 20 μm Co66Fe4Si15B 15 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.

KW - Amorphous soft magnetic ribbon

KW - Magnetic sensor

KW - Magnetoimpedance

KW - Negative feedback

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JF - IEEE Transactions on Magnetics

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ER -

Magnetic sensor system using asymmetric giant magnetoimpedance head

Abstract

Bibliographical note

Keywords

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