Depth-resolved eddy-current detection with GMR magnetometer

The readout electronics of the giant magnetoresistive (GMR) magnetometer for detecting the low-frequency eddy-current signal is investigated. In feedback mode, the GMR magnetometer can sense the bipolar magnetic field up to ±16 gauss with a constant field-to-voltage transfer function at frequencies...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2006-09, Vol.304 (1), p.e470-e473
Main Authors: Jeng, Jen-Tzong, Lee, Guan-Shiun, Liao, Wen-Chu, Shu, Chia-Lun
Format: Article
Language:English
Subjects:
Eddy current
Magnetometer
Magnetoresistive
Nondestructive evaluation
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Summary:The readout electronics of the giant magnetoresistive (GMR) magnetometer for detecting the low-frequency eddy-current signal is investigated. In feedback mode, the GMR magnetometer can sense the bipolar magnetic field up to ±16 gauss with a constant field-to-voltage transfer function at frequencies up to 10 kHz. The capability of the GMR magnetometer in depth-resolved eddy-current detection is demonstrated.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2006.02.070