Self-biasing, non-magnetic, giant magnetoresistance sensor

Details Self-biasing, non-magnetic, giant magnetoresistance sensor Self-biasing, non-magnetic, giant magnetoresistance sensor

1997-08-22

2000-04-11

Kiliman, Leszek

Stock material or miscellaneous articles

Composite

Of inorganic material

428694R, 428694T, 428900, 360113, 360125, 360126, 338 32R, 324252, G11B 566

Patent

active

060486325

ABSTRACT:
A self-biasing, non-magnetic giant magnetoresistive sensor having a Corbino-disk geometry constructed from a thin film of e.g., doped, Mercury Cadmium Telluride (MCT) Hg.sub.1-x Cd.sub.x Te exhibiting anomalously large Giant Magnetresistance (GMR) and zero field offset. In one embodiment, the sensor has a silicon substrate, a layer of doped, inhomogeneous MCT, and electrodes attached to the inhomogeneous layer. Alternatively, a buffer layer of, e.g., CdTe may overlay the substrate. In another embodiment, the sensor has a silicon substrate, a layer of doped, homogeneous MCT, and electrodes attached to the doped homogeneous MCT. Alternatively, a buffer layer of, e.g., CdTe may overlay the substrate as well. With constructed in as either of these embodiments, highly doped Corbino devices may show a significant zero-field offset in the GMR which results in a built-in bias field as high as 1500 G at T=300 K.

REFERENCES:
patent: 5622874 (1997-04-01), Seidler
patent: 5696655 (1997-12-01), Kawano
patent: 5699215 (1997-12-01), Solin
S.A. Solin et al, "Self-biasing nonmagnetic giant magnetoresistance sensor", Applied Physics Letters 69, (26), Dec. 23, 1996, pp. 4105-4107.

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