Magnetic noise measurements using cross-correlated Hall sensor arrays

Jung, G.; Ocio, M.; Paltiel, Y.; Shtrikman, H.; Zeldov, E.
January 2001
Applied Physics Letters;1/15/2001, Vol. 78 Issue 3, p359
Academic Journal
An experimental technique for measuring magnetic fluctuations by means of a double-layer Hall sensor array is described. The technique relies on cross-correlating Hall signals from two independent sensors positioned one above the other in two separate two-dimensional-electron-gas layers of a GaAs/AlGaAs heterostructure. The effectiveness of the technique is demonstrated by a reduction of the magnitude of the background noise floor of the correlated sensors with respect to the noise level of the best single sensor. © 2001 American Institute of Physics.


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