1.
Sensors (Basel)
; 15(12): 30311-8, 2015 Dec 04.
Artigo
em Inglês
| MEDLINE
| ID: mdl-26690144
RESUMO
Magnetic field mapping with micrometric spatial resolution and high sensitivity is a challenging application, and the technological solutions are usually based on large area devices integrating discrete magnetic flux guide elements. In this work we demonstrate a high performance hybrid device with improved field sensitivity levels and small footprint, consisting of a ultra-compact 2D design where nanometric spin valve sensors are inserted within the gap of thin-film magnetic flux concentrators. Pole-sensor distances down to 400 nm are demonstrated using nanofabrication techniques combined with an optimized liftoff process. These 100 × 100 µm2 pixel sensors can be integrated in modular devices for surface mapping without moving parts.