Thin-film magnetic field detector having transverse current and

Details Thin-film magnetic field detector having transverse current and Thin-film magnetic field detector having transverse current and

1994-12-23

1996-05-28

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Magnetometers

257421, 324251, 324252, 338 32R, 338 32H, 360112, 360113, G01R 3307, G01R 3309, G11B 537, H01L 4300

Patent

active

055215009

ABSTRACT:
A magnetic field sensor having a planar element made of a material formed by crystalline magnetoresistive thin layers with an anisotropy of resistivity in the planar element also having, in the planar element, two magnetization axes of different values. This sensor also has two electrical connections enabling, in the presence of an external magnetic field, the flow of a current in the element in a first direction that is not collinear with each of the axes of magnetization and two electrical connections enabling a measurement of voltage in a second direction transversal to the first direction. This sensor thus works by planar Hall effect.

REFERENCES:
patent: 4179719 (1979-12-01), Imamura et al.
patent: 4683535 (1987-07-01), de Ridder et al.
patent: 4782705 (1988-11-01), Hoffmann et al.
patent: 4926226 (1990-05-01), Heremans et al.
J. R. Childress, et al., "New Epitaxial Multilayer System for Spin-valve Magnetic Sensors", Applied Physics Letters, vol. 63, No. 14, Oct. 4, 1993, pp. 1996-1998.

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