Abstract
We demonstrate a simple low-power, magnetic sensor system suitable for high-sensitivity magnetic-field mapping, based on solid-state magnetic tunnel junction devices with minimum detectable fields in a 100 pT range at room temperature. In this paper, we discuss a method that uses multilayer thin films to improve the performance of the soft ferromagnetic layer in magnetoresistive sensor applications, by reducing the coercivity and/or improving the reversibility. We have used it in the design of our new magnetic sensor. This sensor has a sensitivity as high as 750%/mT. The magnetic sensor only dissipates 1 mW of power while operating under an applied voltage of 1 V.
Original language | English (US) |
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Article number | 6028053 |
Pages (from-to) | 3740-3743 |
Number of pages | 4 |
Journal | IEEE Transactions on Magnetics |
Volume | 47 |
Issue number | 10 |
DOIs | |
State | Published - Oct 2011 |
Keywords
- Magnetic concentrators
- magnetic noise
- magnetic sensor
- magnetic tunnel junction (MTJ)
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering