A High-Resolution Planar Hall Effect Magnetometer for Ultra-Low Frequencies
IEEE Sensors Journal(2016)
Abstract
Recent reports have demonstrated field resolutions of planar Hall effect magnetometers in the picotesla range. Here, we report a significant improvement in the field resolution of these sensors by decreasing their preamplifier white noise and the sensing element 1/f noise. We design, build, and test a miniature transformer-matched amplifier with a record noise level of 200 pV/√Hz and improve the f...
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Key words
Magnetic sensors,Magnetometers,Thermal sensors,Perpendicular magnetic anisotropy,Thermal noise
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