Szczegóły publikacji
Opis bibliograficzny
Field noise in tunneling magnetoresistance sensors with variable sensitivity / P. WIŚNIOWSKI, M. DĄBEK, J. Wrona // Applied Physics Letters ; ISSN 0003-6951. — 2015 — vol. 106 iss. 5 art. no. 052404, s. 052404-1–052404-4. — Bibliogr. s. 052404-4, Abstr. — Publikacja dostępna online od: 2015-02-03
Autorzy (3)
- AGHWiśniowski Piotr
- AGHDąbek Michał
- Wrona Jerzy
Dane bibliometryczne
| ID BaDAP | 87961 |
|---|---|
| Data dodania do BaDAP | 2015-02-23 |
| Tekst źródłowy | URL |
| DOI | 10.1063/1.4907621 |
| Rok publikacji | 2015 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Applied Physics Letters |
Abstract
We demonstrate CoFeB/MgO/CoFeB sensors with field noise level below magnetic noise-sensitivity scaling limit and significant reduction of 1/f noise corner frequency. The sensors show more than three orders of magnitude reduction of voltage noise and drop of the corner frequency from 100 kHz to 1 kHz. We achieved this by changing the sensors field sensitivity from 127 (V/T) to 2.7 (V/T) via perpendicular anisotropy-induced field sensitivity modulation. The reduction of the field noise beyond the scaling limit presents sensors for specific field sensitivity. The field sensitivity modulation in our sensors enables magnetic noise reduction that improves field noise (detectivity) and shifts magnetic 1/f corner to lower frequency. The shift of 1/f corner frequency together with the magnetic noise reduction indicates importance of anisotropy-induced sensitivity modulation in reduction of low frequency magnetization fluctuations in CoFeB/MgO/CoFeB sensors. (C) 2015 AIP Publishing LLC.
