Journal
IEEE SENSORS LETTERS
Volume 3, Issue 12, Pages -Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LSENS.2019.2947681
Keywords
Magnetic sensors; equivalent magnetic noise (EMN); magnetometer; planar Hall effect (PHE)
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We integrate elliptical planar Hall effect (PHE) magnetometers with optimized high permeability magnetic flux concentrators. The integrated magnetometers exhibit at room temperature an equivalent magnetic noise of similar to 5 pT/root Hz at 10 Hz, 7.4 pT/root Hz at 1 Hz, and better than 100 pT/root Hz at 10 mHz. The results constitute more than an order of magnitude improvement over previously reported state-of-the-art PHE magnetometers, and demonstrate, for the first time, the ability of a magnetoresistive sensor to match the performance of state-of-the-art, high-end flux-gate, and miniature atomic magnetometers.
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