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High sensitivity and multifunctional micro-Hall sensors fabricated using InAlSb/InAsSb/InAlSb heterostructures
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Date
2009-04-01
Author
BANDO, M
OHASHİ, T
Dede, M.
Akram, R.
Oral, Ahmet
Park, S. Y.
SHİBASAKİ, I
HANDA, H
SANDHU, A
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Further diversification of Hall sensor technology requires development of materials with high electron mobility and an ultrathin conducting layer very close to the material's surface. Here, we describe the magnetoresistive properties of micro-Hall devices fabricated using InAlSb/InAsSb/InAlSb heterostructures where electrical conduction was confined to a 30 nm-InAsSb two-dimensional electron gas layer. The 300 K electron mobility and sheet carrier concentration were 36 500 cm(2) V(-1) s(-1) and 2.5 x 10(11) cm(-2), respectively. The maximum current-related sensitivity was 2 750 V A(-1) T(-1), which was about an order of magnitude greater than AlGaAs/InGaAs pseudomorphic heterostructures devices. Photolithography was used to fabricate 1 mu m x 1 mu m Hall probes, which were installed into a scanning Hall probe microscope and used to image the surface of a hard disk. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3074513]
Subject Keywords
General Physics and Astronomy
URI
https://hdl.handle.net/11511/49207
Journal
JOURNAL OF APPLIED PHYSICS
DOI
https://doi.org/10.1063/1.3074513
Collections
Department of Physics, Article