Size dependence of microscopic Hall sensor detection limits

Vervaeke, K.; Simoen, E.; Borghs, G.; Moshchalkov, V. V.
July 2009
Review of Scientific Instruments;Jul2009, Vol. 80 Issue 7, p074701
Academic Journal
In this paper the magnetic field detection limits of microscopic Hall sensors are investigated as a function of their lateral size. Hall sensors fabricated from GaAs/AlGaAs heterostructures and silicon are experimentally investigated at different temperatures using Hall effect and noise spectrum measurements. At room temperature a clear size dependence of the detection limit is observed, whereas at low temperatures this dependence is found to disappear. The results are explained using the theory of noise in semiconductors.


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