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Magnetization Measurement System With Giant Magnetoresistance Zero-Field Detector

Authors :
Duy-Vinh Dao
Huu-Thang Nguyen
Chinh-Hieu Dinh
Thi-Trang Pham
Van-Dong Doan
Jen-Tzong Jeng
Source :
IEEE Transactions on Magnetics. 58:1-5
Publication Year :
2022
Publisher :
Institute of Electrical and Electronics Engineers (IEEE), 2022.

Abstract

The accuracy in the measurement of magnetization curve (M-H) for soft materials is easily influenced by the external static field in the unshielded environment. To eliminate the influence from the environmental field, the measurement system must be placed in a zero-gauss chamber. However, such a device is not widely available and also costly. In this work, the rapid M-H measurement system with a giant magnetoresistance (GMR) sensor serving as the zero-field detector is proposed. The M-H curve is obtained by integrating the voltage in the pickup coil to determine the magnetization of the test sample under a sweeping magnetic field. The environment field component along the direction of the sweeping field is suppressed by using the output of the GMR sensor as the trigger signal to determine the offset field in the measured M-H curve. The experimental results show that the M-H curves for various kinds of soft magnetic samples, e.g. mu-metal wire, can be obtained under the interference of an applied static field. The proposed method helps improve the accuracy of the rapid M-H measurement system in the unshielded environment.

Details

ISSN :
19410069 and 00189464
Volume :
58
Database :
OpenAIRE
Journal :
IEEE Transactions on Magnetics
Accession number :
edsair.doi...........c0b8a5096aa2cfc1658c7fd9ccc2ad98