Precise Measurement of Quantized Hall Resistance on the Basis of a Cryogenic Current Comparator

We report on the setup of an accurate quantized Hall effect measurement system including a homemade cryogenic current comparator system, a He‐3 bath cryostat with a 12 T superconducting magnet and a homemade air bath with a temperature stability of 0.005 °C at 23.000 °C. The performance of the system was verified through calibration of a standard resistor of 100 Ω against the quantized Hall resistance (QHR) at plateau i = 2, RH(2) = 12.9 kΩ. The reproducibility of the QHR measurements is reliable at a relative uncertainty of few parts in 109.