Abstract
A measurement system for precise realization of quantum Hall resistance standard with GaAs heterostructures is described. A comparison with a standard Klitzing resistor is shown and discussed. The preliminary results indicate that the value of RH,2 realized in Hall plateau (i=2) is very close to CIPM value. Thus the technique will offer a more reliable and precise calibration service through transfer standard. Further attempts to improve the measurements for precise determination of RH are underway.
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