50 nm Hall sensors for room temperature scanning Hall probe microscopy

Download
2004-02-01
SANDHU, ADARSH
KUROSAWA, KOUİCHİ
DEDE, MUNIR
Oral, Ahmet
Bismuth nano-Hall sensors with dimensions similar to50 nm x 50 nm were fabricated using a combination of optical lithography and focused ion beam milling. The Hall coefficient, series resistance and optimum magnetic field sensitivity of the sensors were 4 x 10(-4) Omega/G 9.1 kOmega and 0.8 G/ rootHz, respectively. A 50 nm nano-Bi Hall sensor was installed into a room temperature scanning Hall probe microscope and successfully used for directly imaging ferromagnetic domains of low coercivity garnet thin films.
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS

Suggestions

Single layer graphene Hall sensors for scanning Hall probe microscopy (SHPM) in 3-300 K temperature range
Sonusen, S.; KARCI, ÖZGÜR; DEDE, MUNIR; Aksoy, S.; Oral, Ahmet (2014-07-30)
Graphene micro-Hall probes were developed for a scanning Hall probe microscope system and used for the direct magnetic imaging domains of demagnetized NdFeB permanent magnet for the first time. The Hall coefficient and minimum magnetic field resolution of graphene Hall probes at 1 kHz were found to be 0.18 Omega/G and 0.20 G/root Hz for a drive current of 3 mu A at room temperature in vacuum. The magnetic domains in NdFeB demagnetized magnet were observed at 300K, 126K and 3K successfully.
Room temperature scanning Hall probe microscopy using GaAs/AlGaAs and Bi micro-hall probes
Sandhu, A; Masuda, H; Oral, Ahmet; Bending, S.J; Yamada, A; Konagi, M (2002-08-12)
A room temperature scanning Hall probe microscope system utilizing GaAs/AlGaAs and bismuth micro-Hall probes was used for magnetic imaging of ferromagnetic domain structures on the surfaces of crystalline thin film garnets and permanent magnets. The Bi micro-Hall probes had dimensions ranging between 0.25 and 2.8 mum(2) and were fabricated using a combination of optical lithography and focused ion beam milling. The use of bismuth was found to overcome surface depletion effects associated with semiconducting...
Nano and micro Hall-effect sensors for room-temperature scanning hall probe microscopy
SANDHU, A; OKAMOTO, A; SHİBASAKİ, I; Oral, Ahmet (2004-06-01)
GaAs/AlGaAs two-dimensional electron gas (GaAs-2DEG) Hall probes are impractical for sub-micron room-temperature scanning Hall microscopy (RT-SHPM), due to surface depletion effects that limit the Hall driving current and magnetic sensitivity (B in). Nano and micro Hall-effect sensors were fabricated using Bi and InSb thin films and shown to be practical alternatives to GaAs-2DEG probes for high resolution RT-SHPM. The GaAs-2DEG and InSb probes were fabricated using photolithography and the Bi probes by opt...
Room temperature magnetic imaging of magnetic storage media and garnet epilayers in the presence of external magnetic fields using a sub-micron GaAs SHPM
SANDHU, Adarsh; MASUDA, Hiroshi; Oral, Ahmet; Bending, Simon.J. (2000-09-15)
A multipurpose room temperature scanning Hall probe microscope (RT-SHPM) system incorporating an ultra-high sensitive sub-micron GaAs Hall probe (active area of 0.8 0.8 mm2 ; room temperature Hall coefficient of 0.3 O/G) exhibiting extremely high magneticfield sensitivity (0.04G/pHz) was used for the direct, non-invasive and quantitative imaging of magnetic field fluctuations in very close proximity to the surfaces of thin film magnetic storage media, Bi substituted iron garnet epilayers and demagnetized ...
Room-temperature scanning Hall probe microscope (RT-SHPM) imaging of garnet films using new high-performance InSb sensors
Oral, Ahmet; DEDE, M; MASUDA, H; OKAMOTO, A; SHİBASAKİ, I; SANDHU, A (Institute of Electrical and Electronics Engineers (IEEE), 2002-09-01)
High-performance InSb micro-HaIl sensors were fabricated by optical lithography and incorporated in a room-temperature scanning Hall probe microscope for imaging of localized magnetic fluctuations in close proximity to the surfaces of crystalline uniaxial garnet films. The room-temperature noise figure of the InSb sensors was 6-10 mG/v/Hz, which is an order of magnitude better than GaAs-AlGaAs two-dimensional electron gas sensors used to date.
Citation Formats
A. SANDHU, K. KUROSAWA, M. DEDE, and A. Oral, “50 nm Hall sensors for room temperature scanning Hall probe microscopy,” JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS, pp. 777–778, 2004, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/33403.