Novel Hall sensors developed for magnetic field imaging systems.

Conference · Sat Sep 01 00:00:00 EDT 2007 · J. Magn. Magn. Mater.

DOI:https://doi.org/10.1016/j.jmmm.2007.02.104· OSTI ID:914792

Cambel, V; Karapetrov, G; Novosad, V; Bartolome, E; Gregusova, D; Fedor, J; Kudela, R; Soltys, J

We report here on the fabrication and application of novel planar Hall sensors based on shallow InGaP/AlGaAs/GaAs heterostructure with a two-dimensional electron gas (2DEG) as an active layer. The sensors are developed for two kinds of experiments. In the first one, magnetic samples are placed directly on the Hall sensor. Room temperature experiments of permalloy objects evaporated onto the sensor are presented. In the second experiment, the sensor scans close over a multigranular superconducting sample prepared on a YBCO thin film. Large-area and high-resolution scanning experiments were performed at 4.2 K with the Hall probe scanning system in a liquid helium flow cryostat.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC02-06CH11357
• OSTI ID: 914792
• Report Number(s): ANL/MSD/CP-118593; TRN: US200812%%276
• Journal Information: J. Magn. Magn. Mater., Vol. 316, Issue 2 ; Sep. 2007; Conference: 3rd Joint European Magnetic Symposia; Jun 26-30, 2006; San Sebastian, Spain
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

36 MATERIALS SCIENCE
ELECTRON GAS
FABRICATION
HELIUM
MAGNETIC FIELDS
PERMALLOY
PROBES
THIN FILMS