Electric Field-Tunable Giant Magnetoresistance (GMR) Sensor with Enhanced Linear Range.
giant magnetoresistance
magnetic field sensor
magnetoelectric coupling
multiferroic
tunable sensor
Journal
ACS applied materials & interfaces
ISSN: 1944-8252
Titre abrégé: ACS Appl Mater Interfaces
Pays: United States
ID NLM: 101504991
Informations de publication
Date de publication:
19 Feb 2020
19 Feb 2020
Historique:
pubmed:
28
1
2020
medline:
28
1
2020
entrez:
28
1
2020
Statut:
ppublish
Résumé
The operation mechanism of giant magnetoresistance (GMR) sensors relies on the linear response of the magnetization direction to an external magnetic field. Since the magnetic anisotropy of ferromagnetic layers can be manipulated by a strain-mediated magnetoelectric coupling effect, we propose a tunable GMR magnetic field sensor design that allows for voltage tuning of the linear range and sensitivity. A spin valve structure Ru/CoFe/Cu/CoFe/IrMn/Ru is grown on a PMN-PT (011) substrate, and the magnetization directions of ferromagnetic layers can be controlled by an electric field. An adjustable linear magnetoresistance is therefore induced. Based on the magnetoelectric coupling effect and spin valve, we prepared tunable GMR magnetic field sensors with bridge structures. The linear sensing range of a DC magnetic field is enhanced 6 times by applying an electric field of 14 kV/cm. The electrically tunable GMR sensor fulfills the requirements to work at different magnetic field ranges in the same configuration, therefore exhibiting great potential for applications in the Internet of things.
Identifiants
pubmed: 31984722
doi: 10.1021/acsami.9b20038
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM