Atomic layered materials and temperature control for giant magne

Details Atomic layered materials and temperature control for giant magne Atomic layered materials and temperature control for giant magne

1993-04-30

1995-08-08

O'Shea, Sandra L.

Electricity: measuring and testing

Magnetic

Magnetometers

32420721, 324224, 360113, 365158, 338 32R, G01R 3302, G11B 539, G11B 512, H01L 4300

Patent

active

054402336

ABSTRACT:
An apparatus and method for detecting a magnetic field has been described incorporating a material which switches from an antiferromagnetic order to a ferromagnetic order upon the application of a magnetic field and wherein the material is FeRh, FeRu, FePd or MnPt, a heating element for controlling the temperature of the material and a current source for sensing the change of resistance of the material to determine when the material is ferromagnetically ordered. The invention overcomes the problem of small changes in resistance of magnetoresistive sensors operating in only the ferromagnetic order.

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Temperature Regulated Bismuth Resistor with Magnetic Field Measurement Dols et al., The Review of Scientific Instruments, vol. 29, #5, Masy 1958.
J. S. Kouvel et al., J. Appl. Phys. Supp. Co vol. 33, 1343 (1962).

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