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.
Rok vydání:	2019
Předmět:	Physics - Applied Physics Condensed Matter - Materials Science Physics - Instrumentation and Detectors
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
Externí odkaz:	http://arxiv.org/abs/1909.04531 Zobrazit plný text záznamu View this record from Arxiv