Using a commercially available anisotropic magnetoresistance (AMR) sensor of HMC1001, we developed a sensitive magnetometer. It could operate in amplifier mode or feedback mode. The magnetic field sensitivity of the AMR sensor was about . When the AMR sensor was biased by a voltage of 24 V, the magnetic field resolutions of the AMR magnetometer were about at 1 kHz and at 100 Hz. We used the AMR magnetometer for Eddy-current nondestructive evaluation in unshielded environment.
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2009
American Institute of Physics
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