Optimizing magnetoresistive sensor signal-to-noise via pinning field tuning
Autor: | Moulin, J., Doll, A., Paul, E., Pannetier-Lecoeur, M., Fermon, C., Sergeeva-Chollet, N., Solignac, A. |
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Rok vydání: | 2019 |
Předmět: | |
Druh dokumentu: | Working Paper |
DOI: | 10.1063/1.5108604 |
Popis: | The presence of magnetic noise in magnetoresistive-based magnetic sensors degrades their detection limit at low frequencies. In this paper, different ways of stabilizing the magnetic sensing layer to suppress magnetic noise are investigated by applying a pinning field, either by an external field, internally in the stack or by shape anisotropy. We show that these three methods are equivalent, could be combined and that there is a competition between noise suppression and sensitivity reduction, which results in an optimum total pinning field, for which the detection limit of the sensor is improved up to a factor of ten. Comment: 5 pages, 3 figures |
Databáze: | arXiv |
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