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Flux-gate like 2D magnetometer based on a single magnetic tunnel junction
Published online by Cambridge University Press: 04 March 2005
Abstract
The pick-up coil of a conventional flux-gate sensor has been replaced by a magnetic tunnel junction. With this respect, the magnetic properties of tunnel junctions have been optimized to be relevant to flux-gate operation i.e. low-coercitive field and reproducibility of the dynamic switchings. Furthermore, the use of an alternative two-dimensional magnetic driving field extends the use of the flux-gate like sensor to make a 2D magnetometer with a single magnetic tunnel junction without any cross sensitivity. A first demonstration is given with sensitivity above 500 V/T and a noise level evaluated to 2 $\rm \mu T/ \sqrt{Hz}$ with an optimized magnetoresistive response.
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- Research Article
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- © EDP Sciences, 2005
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