Abstract
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 ∼5 pT/√Hz at 10 Hz, 7.4 pT/√Hz at 1 Hz, and better than 100 pT/√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.
Original language | English |
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Article number | 8871164 |
Journal | IEEE Sensors Letters |
Volume | 3 |
Issue number | 12 |
DOIs | |
State | Published - 1 Dec 2019 |
Keywords
- Magnetic sensors
- equivalent magnetic noise (EMN)
- magnetometer
- planar Hall effect (PHE)
ASJC Scopus subject areas
- Instrumentation
- Electrical and Electronic Engineering